Computer Scientist, Ph.D.

Researcher on Artificial Intelligence, investigating the role of intelligent and autonomous agents in understanding and serving human beings in a tailored and personalized fashion. My background gives me three essential tools: knowledge of data, semantics as natural extension and lever of the former, and knowledge of machines that learn. We use daily machine learning, but trying to keep a human in the loop to validate and reinforce what the algorithm has learned from the given examples. I'm fascinated by giving to intelligent agents emotions and awareness to better interact with humans. I've co-founded the Knowledge to Data Lab , a group of talented researchers bridging ISMB and EURECOM working on Data Science and Artificial Intelligence.

I'm now Senior Data Scientist in ISMB working in the Innovation Development Research Area. We are forging the future of data-driven innovation doing research on three different axes: data science, data experience and economics. Take a deeper look at our value proposition.

I'm always looking for brilliant padawans. Take a look at the theses available and do not hesitate to dop me an email, will have fun!

PasTime: Packaging Personalised Tourist Experiences
EIT Digital, Digital Cities (2017)
Consortium: 6 partners from 4 EU states

Led the research and development of a sequence recommender of tourist activities. PI of ISMB
#ml #knowledgegraph #deeplearning #recsys

3cixty: An Innovative Platform for Building City Apps
EIT Digital, Digital Cities (2014-2016)
Consortium: 10 partners from 6 EU states

Contributed to the design of the data integration layer. Led the development of the data reconciliation framework. PI of ISMB
#ml #knowledgegraph #deduplication

2018

• Mensio M., Bastianelli E., Tiddi I., Rizzo G. (2018), A Multi-layer LSTM-based Approach for Robot Command InteractionModeling. In (IROS2018) Workshop on Language and Robotics Madrid, Spain
• Monti D., Palumbo E., Rizzo G., Morisio M. (2018), Sequeval: A Framework to Assess and Benchmark Sequence-based Recommender Systems. In (RecSys2018) Offline Evaluation for Recommender Systems Workshop Vancouver, Canada
• Monti D., Rizzo G., Morisio M. (2018), A Distributed and Accountable Approach to OfflineRecommender Systems Evaluation. In (RecSys2018) Offline Evaluation for Recommender Systems Workshop Vancouver, Canada
• Monti D., Palumbo E., Rizzo G., Lisena P., Troncy R., Fell M., Cabrio E., Morisio M. (2018), An Ensemble Approach of Recurrent Neural Networks using Pre-Trained Embeddings for Playlist Completion. In ACM Recommender Systems Challenge 2018 Vancouver, Canada
• Rashid M., Rizzo G., Torchiano M., Mihindukulasooriya N., Corcho O., García-Castro R. (2018), Completeness and Consistency Analysis for Evolving Knowledge Bases. In Journal of Web Semantics, to appear
• Rashid M., Rizzo G., Torchiano M., Mihindukulasooriya N., Corcho O. (2018) Knowledge Base Evolution Analysis: A Case Study in the Tourism Domain. In (ICWE2018) 1st International Workshop on Knowledge Graphs on Travel and Tourism, Caceres, Spain
• Rashid M., Torchiano M., Rizzo G., Mihindukulasooriya N., Corcho O. (2018) A Quality Assessment Approach for EvolvingKnowledge Bases. In Semantic Web Journal, to appear
• Caroleo B.R.D., Palumbo E., Osella M. Lotito A., Rizzo G., Ferro E.G., Attanasio A., Chiusano S.A., Zuccaro, G., Leone M., De Gregorio D. (2018) A Knowledge-Based Multi-Criteria Decision Support System Encompassing Cascading Effects For Disaster Management. In International Journal of Information Technology & Decision Making, volume 17 (5), pages 1469-1498
• Palumbo E., Rizzo G., Troncy R., Baralis E., Osella M., Ferro E. (2018) Translational Models for Item Recommendation. In Gangemi A. et al. (eds) The Semantic Web: ESWC 2018 Satellite Events
• Palumbo E., Rizzo G., Troncy R., Baralis E., Osella M., Ferro E. (2018) An Empirical Comparison of Knowledge Graph Embeddings for Item Recommendation. In (ESWC2018) International Workshop on Deep Learning for Knowledge Graphs and Semantics Technologies, Heraklion, Greece
• Palumbo E., Rizzo G., Troncy R., Baralis E., Osella M., Ferro E. (2018) Knowledge Graph Embeddings with node2vec for Item Recommendation. In 15th European Semantic Web Conference (ESWC), Heraklion, Greece. Best Poster
• Carducci G., Rizzo G., Monti D., Palumbo E., Morisio M. (2018) TwitPersonality: Computing Personality Traits from Tweets Using Word Embeddings and Supervised Learning. In Information volume 9 (5), 127
• Mensio M., Rizzo G., Morisio M. (2018) Multi-turn QA: A RNN Contextual Approach to Intent~Classification for Goal-oriented Systems. In (WWW) 1st International Workshop on Hybrid Question Answering with Structured and Unstructured Knowledge (HQA) Lyon, France
• Mensio M., Rizzo G., Morisio M. (2018) The Rise of Emotion-aware Conversational Agents: Threats in Digital Emotions . In (WWW) Re-coding Black Mirror Lyon, France
• Palumbo E., Rizzo G., Troncy R. (2018) STEM: Stacked Threshold-based Entity Matching for Knowledge Base Generation. In Semantic Web Journal, to appear
• Plu J., Prokofyev R., Tonon A., Cudré-Mauroux P., Difallah D. E., Troncy R., Rizzo G. (2018) Sanaphor++: A Combination of Deep Neural Networks and Semantics for Coreference Resolution . In 11th edition of the Language Resources and Evaluation Conference (LREC), Miyazaki, Japan
• Brasoveanu A., Rizzo G., Kuntschik P., Weichselbraun A., Nixon L. (2018) Framing Named Entity Linking Error Types. In 11th edition of the Language Resources and Evaluation Conference (LREC), Miyazaki, Japan
• Mihindukulasooriya N., Rashid M. R., Rizzo G., García-Castro R., Corcho O., Torchiano M. (2018) RDF Shape Induction using Knowledge Base Profiling. In 33rd ACM/SIGAPP Symposium On Applied Computing (SAC) Pau, France

2017

• Rashid M. R., Rizzo G., Mihindukulasooriya N., Torchiano M., Corcho O. (2017) KBQ - A Tool for Knowledge Base Quality Assessment UsingEvolution Analysis. In (K-CAP) Workshop on Machine Reading, Austin, US
• Palumbo E., Rizzo G., Troncy R. (2017) Predicting Your Next Stop-over from Location-based Social Network Data with Recurrent Neural Networks. In (RecSys) ACM RecSys Workshop on Recommenders in Tourism (RecTour) , Como, Italy
• Troncy R., Rizzo G., et al. (2017) 3cixty: Building Comprehensive Knowledge Bases For City Exploration. In Journal of Web Semantics (JWS) , volumes 46–47, pages 2-13
• Palumbo E., Rizzo G., Troncy R. (2017) entity2rec: Learning User-Item Relatedness from Knowledge Graphs for Top-N Item Recommendation. In 11th ACM Conference on Recommender Systems (RecSys) , Como, Italy
• Plu J., Troncy R., Rizzo G. (2017) ADEL: une méthode adaptative de désambiguïsation d’entités nommées. In 28es Journées francophones d'Ingénierie des Connaissances (IC), Caen, France
• Palumbo E., Sygkounas E., Troncy R., Rizzo G. (2017) SentiME++ at SemEval-2017 Task 4A: Stacking State-of-the-Art Classifiers to Enhance Sentiment Classification. In International Workshop on Semantic Evaluation (SemEval), Vancouver, Canada
• Plu J., Troncy R., Rizzo G. (2017) ADEL at OKE2017 . In (ESWC), Open Extraction Challenge, Portoroz, Slovenia. 1st ranked system
• Rizzo G., Pereira B., Varga A., van Erp M., Cano Basave A. E. (2017) Lessons Learnt from the Named Entity rEcognition and Linking (NEEL) Challenge Series. In Semantic Web Journal, volume 8, no. 5, pp. 667-700
• Rizzo G., Meo R., Pensa R., Falcone G., Troncy R. (2017) Shaping City Neighborhoods Leveraging Crowd Sensors. In Information Systems, volume 64, pages 368-378
• Rizzo G., Tomassetti F., Vetrò A., Ardito L., Torchiano M., Morisio M., Troncy R. Semantic Enrichment for Recommendation of Primary Studies in a Systematic Literature Review. In Digital Scholarship in the Humanities, volume 32 issue 1, pages 195-208

2016

• Basile P., Caputo A., Gentile A. L., Rizzo G. (2016) Overview of the EVALITA 2016 Named Entity rEcognition and Linking in Italian Tweets (NEEL-IT) Task. In 5th Evaluation Campaign of Natural Language Processing and Speech Tools for Italian (EVALITA) Naples, Italy
• Sygkounas E., Rizzo G., Troncy R. (2016) A Replication Study of the Top Performing Systems in SemEval Twitter Sentiment Analysis. In 15th International Semantic Web Conference (ISWC), resources Track, Kobe, Japan
• Palumbo E., Rizzo G., Troncy R. (2016) An Ensemble Approach to Financial Entity Matching for the FEIII 2016 Challenge. In (SIGMOD), Financial Entity Identification and Information Integration Challenge, San Francisco, US
• Plu J., Rizzo G., Troncy R. (2016) Enhancing Entity Linking by Combining NER Models. In 13th Extended Semantic Web Conference (ESWC), Challenges Track, Heraklion, Greece
• Sygkounas E., Rizzo G., Troncy R. (2016) Sentiment Polarity Detection From Amazon Reviews: An Experimental Study. In 13th Extended Semantic Web Conference (ESWC), Challenges Track, Heraklion, Greece
• Sygkounas E., Li X., Rizzo G., Troncy R. (2016) The SentiME System at the SSA Challenge. In (ESWC), Challenge on Fine-Grained Sentiment Analysis, Heraklion, Greece. 1st ranked system
• Mihindukulasooriya N., Rizzo G., Troncy R., Corcho O., Garcia-Castro R. (2016) A Two-Fold Quality Assurance Approach for Dynamic Knowledge Bases: The 3cixty Use Case. In (ESWC), International Workshop on Completing and Debugging the Semantic Web, Heraklion, Greece
• Palumbo E., Osella M., Rizzo G., Ferro E., Zuccaro G., Leone M., De Gregorio D. (2016) SnowBall DSS: an Ensemble Multi-Criteria Decision Support System encompassing cascading effects for disaster management. In International Conference on Decision Support System Technology (ICDSST), Plymouth, England
• van Erp M., Mendes P., Paulheim H., Ilievski F., Plu J., Rizzo G., Waitelonis J. (2016) Evaluating Entity Linking: An Analysis of Current Benchmark Datasets and a Roadmap for Doing a Better Job. In 10th edition of the Language Resources and Evaluation Conference (LREC), Portorož, Slovenia
• Ilievski F., Rizzo G., van Erp M., Plu J., Troncy R. (2016) Context-Enhanced Adaptive Entity Linking. In 10th edition of the Language Resources and Evaluation Conference (LREC), Portorož, Slovenia
• Rizzo G., van Erp, Plu J., Troncy R. (2016) Making Sense of Microposts (#Microposts2016) Named Entity rEcognition and Linking (NEEL) Challenge. In (WWW'16), 6th International Workshop on Making Sense of Microposts (#Microposts), Montreal, Canada

2015

• Rizzo G., Troncy R., Corcho O., Jameson A., Plu J., Ballesteros Hermida J.C., Assaf A., Barbu C., Spirescu A., Kuhn K., Celino I., Agarwal R., Nguyen C.K., Pathak A., Scanu C., Valla M., Haaker T., Verga E.S., Rossi M., Redondo Garcia J.L. (2015) 3cixty@Expo Milano 2015: Enabling Visitors to Explore a Smart City. In 14th International Semantic Web Conference (ISWC) Semantic Web Challenge, Bethlehem, Pennsylvania, USA. SWC Winner
• Plu J., Rizzo G., Troncy R. (2015) An Experimental Study of a Hybrid Entity Recognition and Linking System. In 14th International Semantic Web Conference (ISWC) Poster Demo Session, Bethlehem, Pennsylvania, USA
• Plu J., Rizzo G., Troncy R. (2015) Revealing Entities from Textual Documents Using a Hybrid Approach. In ( ISWC'15) 3rd International Workshop on NLP & DBpedia, Bethlehem, Pennsylvania, US
• Rizzo G., Corcho O., Troncy R., Plu J., Ballesteros Hermida, J. C., Assaf A. (2015) The 3cixty Knowledge Base for Expo Milano 2015: Enabling Visitors to Explore the City. In 8th International Conference on Knowledge Capture (K-CAP'15), Palisades, NY, US Best Poster.
• Redondo Garcia J. L., Rizzo G., Troncy R. (2015) Capturing News Stories Once, Retelling a Thousand Ways. In 8th International Conference on Knowledge Capture (K-CAP'15), Palisades, NY, USA. Best Paper
• Redondo Garcia J. L., Rizzo G., Troncy R. (2015) The Concentric Nature of News Semantic Snapshots: Knowledge Extraction for Semantic Annotation of News Items. In 8th International Conference on Knowledge Capture (K-CAP'15), Palisades, NY, US
• Redondo Garcia J. L., Rizzo G., Romero L. P., Hildebrand M., Troncy R. (2015) Generating Semantic Snapshots of Newscasts using Entity Expansion. In 15th International Conference on Web Engineering (ICWE'15), Rotterdam, The Netherlands
• Plu J., Rizzo G., Troncy R. (2015) A Hybrid Approach for Entity Recognition and Linking. In 12th European Semantic Web Conference (ESWC'15), Open Extraction Challenge, Portoroz, Slovenia. 1st ranked system
• Rizzo G., Cano A.E., Pereira B., Varga A. (2015), Making Sense of Microposts (#Microposts2015) Named Entity rEcognition & Linking Challenge. In (WWW'15), 5th International Workshop on Making Sense of Microposts (#Microposts'15), Florence, Italy
• Usbeck R., Röder M., Ngonga Ngomo A., Baron C., Both A., Brummer M., Ceccarelli D., Cornolti M., Cherix D., Eickmann B., Ferragina P., Lemke C., Moro A., Navigli R., Piccinno F., Rizzo G., Sack H., Speck R., Troncy R., Waitelonis J., Weseman L. (2015) GERBIL -- General Entity Annotator Benchmarking Framework. In 24th International World Wide Web Conference (WWW'15), Florence, Italy
• Derczynski L., Maynard D., Rizzo G., van Erp M., Gorrell G., Troncy R., Petrak J., Bontcheva K. (2015) Analysis of Named Entity Recognition and Linking for Tweets. In Information Processing and Management, volume 51 issue 2, pages 32-49

2014

• Rizzo G., Erp M., Troncy R. (2014), Inductive Entity Typing Alignment. In (ISWC'14) 2nd International Workshop on Linked Data for Information Extraction (LD4IE'14), Riva del Garda, Italy
• Rizzo G., Erp M., Troncy R. (2014), Benchmarking the Extraction and Disambiguation of Named Entities on the Semantic Web. In 9th edition of the Language Resources and Evaluation Conference (LREC'14), Reykjavik, Iceland
• Rizzo G., Falcone G., Meo R., Pensa R., Troncy R., Milicic V. (2014), Geographic Summaries from Crowdsourced Data. In 11th Extended Semantic Web Conference (ESWC'14) Poster Demo Session, Hersonissou, Crete, Greece
• Tomassetti F., Rizzo G., Troncy R. (2014), CrossLanguageSpotter: A Library for Detecting Relations in Polyglot Frameworks. In 23rd International World Wide Web Conference (WWW'14) Dev Track, Seoul, Korea
• Cano A.E., Rizzo G., Varga A., Rowe M., Stankovic M., Dadzie A.S. (2014), Making Sense of Microposts (#Microposts2014) Named Entity Extraction & Linking Challenge. In (WWW'14),4th International Workshop on Making Sense of Microposts (#Microposts'14), Seoul, Korea
• Tomassetti F., Rizzo G., Torchiano M. (2014), Spotting Automatically Cross-Language Relations. In Conference on Software Maintenance, Reengineering and Reverse Engineering (CSMR-WCRE'14), Antwerp, Belgium
• Rizzo G., Erp M., Troncy R. (2014), Evaluating Named Entity Recognition and Disambiguation in News and Tweets. In 24th Meeting of Computational Linguistics in The Netherlands (CLIN'14), Leiden, The Netherlands

2013

• Milicic V., Redondo Garcia J.L., Rizzo G., Troncy R. (2013), Grab your Favorite Video Fragment: Interact with a Kinect and Discover Enriched Hypervideo. Demo at European Interactive TV Conference (EuroITV'13), Como, Italy
• Milicic V., Redondo Garcia J.L., Rizzo G., Troncy R. (2013), Tracking and Analyzing The 2013 Italian Election. Demo at Extended Semantic Web Conference (ESWC'13), Montpellier, France
• Li Y., Rizzo G., Redondo Garcia J.L., Troncy R. (2013), Enriching Media Fragments with Named Entities for Video Classification. In (WWW'13) 1st Worldwide Web Workshop on Linked Media (LiME'13), Rio de Janeiro, Brazil
• Erp M., Rizzo G, Troncy R. (2013), Learning with the Web: Spotting Named Entities on the intersection of NERD and Machine Learning. In (WWW'13) 3rd International Workshop on Making Sense of Microposts (#MSM'13) , Concept Extraction Challenge, Rio de Janeiro, Brazil. 3rd ranked system
• Troncy R., Milicic V., Rizzo G., Redondo Garcia J.L. (2013), MediaFinder: Collect, Enrich and Visualize Media Memes Shared by the Crowd. In (WWW'13) 2nd International Workshop on Real-Time Analysis and Mining of Social Streams (RAMSS'13), Rio de Janeiro, Brazil
• Milicic V.,Rizzo G., Redondo Garcia J.L., Troncy R., Steiner T. (2013), Live Topic Generation from Event Streams. Demo at International World Wide Web Conference (WWW'13), Rio de Janeiro, Brazil

2012

• Li Y., Rizzo G., Troncy R., Wald M., Wills G. (2012), Creating Enriched YouTube Media Fragments With NERD Using Timed-Text. Demo at International Semantic Web Conference (ISWC'12), Boston, US
• Steiner T., Verborgh R., Troncy R., Rizzo G., Redondo Garcia J.L., Gabarro J. and Van De Walle R. (2012), Modeling and Reconciling Nightlife Events from Public Event Databases for the Automatic Generation of Magazines. Demo at the DeRiVE'12) workshop at the International Semantic Web Conference (ISWC'12), Boston, US
• Rizzo G., Steiner T., Troncy R., Verborgh R., Redondo Garcia J. L. and Van de Walle R. (2012), What Fresh Media Are You Looking For? Extracting Media Items from Multiple Social Networks. In (ACM Multimedia) International Workshop on Socially-Aware Multimedia (SAM'12), Nara, Japan
• Khrouf H., Atemezing G., Steiner T., Rizzo G., Troncy R. (2012), Confomaton: A Conference Enhancer with Social Media from the Cloud. Demo Session at the Extended Semantic Web Conference (ESWC'12), Heraklion, Greece
• Khrouf H., Atemezing G., Rizzo G., Troncy R., Steiner T. (2012), Aggregating Social Media for Enhancing Conference Experiences. In (ICWSM'12) Real-Time Analysis and Mining of Social Streams (RAMSS'12), Dublin, Ireland
• Rizzo G., Troncy R. (2012), NERD: A Framework for Unifying Named Entity Recognition and Disambiguation Web Extraction Tools. System Demonstration at European chapter of the Association for Computational Linguistics (EACL'12), Avignon, France
• Rizzo G, Troncy R., Hellmann S. and Bruemmer M. (2012), NERD meets NIF: Lifting NLP Extraction Results to the Linked Data Cloud. In (WWW'12) Linked Data on the Web (LDOW'12), Lyon, France

2011

• Rizzo G., Morando F., De Martin J.C. (2011), Open Data: la piattaforma di dati aperti per il Linked Data. In Informatica e Diritto, volume 20, issue 1-2, pages 493-511
• Rizzo G., Troncy R. (2011), NERD: Evaluating Named Entity Recognition Tools in the Web of Data. In (ISWC'11) Workshop on Web Scale Knowledge Extraction (WEKEX'11), Bonn, Germany
• Rizzo G., Troncy R. (2011), NERD: A Framework for Evaluating Named Entity Recognition Tools in the Web of Data. Demo Session at the International Semantic Web Conference 2011 (ISWC'11), Bonn, Germany
• Restagno L., Akkermans V., Rizzo G., Servetti A. (2011), A Semantic Web Annotation Tool for a Web-Based Audio Sequencer. In 11th international conference on Web engineering (ICWE'11), Paphos, Cyprus
• Mudu E., Schiatti L., Rizzo G., Servetti A. (2011), Zenaminer: driving the SCORM standard towards the Web of Data. In (ESWC'11) Workshop on eLearning Approaches for the Linked Data Age (Linked Learning 2011), Heraklion, Greece
• Mudu E., Schiatti L., Rizzo G., Servetti A., Farinetti L. (2011), Zenaminer: lo standard SCORM incontra il Web of Data. In Informatica per la Didattica (DIDAMATICA), Turin, Italy
• Tomassetti F., Rizzo G., Vetro' A., Ardito L., Torchiano M., Morisio M. (2011), Linked Data approach for selection process automation in Systematic Reviews. In 15th Annual Conference on Evaluation & Assessment in Software Engineering (EASE'11), Durham City, United Kingdom

2010

• Di Nunzio P., Di Gregorio F., Rizzo G., Servetti A. (2010), Reliable SPARQL queries with consistent results over P2P-shared RDF storage. In International Journal of Web Applications (IJWA), volume 2, issue 3, pages 151-163
• Rizzo G., Meirone B., Di Nunzio P., Di Gregorio F. (2010), Distributed Semantic Video Tagging for Peer-to-Peer Authoring System. In (DEXA'10) Workshop on Web Semantics and Information Processing (WebS '10), September, Bilbao, Spain

2009

• Rizzo G., Di Gregorio F., Di Nunzio P., Servetti A., De Martin J.C. (2009), A Peer-to-Peer Architecture For Distributed And Reliable RDF Storage. In 1th International Conference on Networked Digital Technologies (NDT '09), July, Ostrava, Czech Republic