Fabrizio Silvestri is a Research Scientist at Facebook AI London, UK, in the Integrity team. His interests are in Web Search, and in particular his specialization is building systems to better interpret queries from users’ search traces. Prior to Facebook, Fabrizio was a Principal Scientist at Yahoo Research, where he has worked on sponsored search and native advertising within the Yahoo Gemini project. Fabrizio holds a Ph.D. in Computer Science from the University of Pisa, Italy, where he studied problems related to Web Information Retrieval with particular focus on efficiency issues like caching, collection partitioning, and distributed IR in general. He authored around 140 research papers, which are published in topmost international peer-reviewed journals and conferences.