Knowledge BasesA knowledge base (KB) is a structured, computer-processable description of the world. A KB can be thought of as a graph, in which the nodes are entities and the edges are relations. Here is an example: KBs serve all kinds of purposes, such as natural language understanding in chatbots, intelligent assistance, or Web search. Our research is guided by specific real-world problems on KBs. I work together with my colleagues and students in the DIG Team of Télécom Paris to formalize problems, to design principled models for their solution, and to develop real systems that produce that solution.
ProjectsApart from that, we work on several projects around knowledge bases:
- Knowledge Base Construction
- We work on extracting computer-readable information from Web sources. Our flagship project in this domain is YAGO, a large knowledge base constructed from Wikidata, schema.org, and other Web sources. We have also developed several approaches to query knowledge bases efficiently. One approach is based on Bash commands
- Information Extraction
- Our main project in this area is the NoRDF project, which extracts complex information from natural language text. We also work on extracting commercial products from the Web.
- Data mining
- We work on algorithms that can find automatically where a knowledge base is missing information. Our flagship project here is the AMIE rule mining system, but we also work on determining the completeness of entities, or the necessity of attributes. Here is an overview on our work of mining completeness in knowledge bases.
- Recently, we have started to work on making machine learning algorithms explainable. We are also analysing the limits of deep learning.
See the list of publications for more projects.
Students, engineers, & postdocs
- Deep Learning
- Rule Mining
- François Amat (PhD student, 2021-)
- NoRDF project
- OTELO project
- Mathilde Hutin (postdoc, 2020-, co-advised with Ioana Vasilescu)
Former students & postdocs
- Yaru Wu (postdoc, 2020-2021, co-advised with Ioana Vasilescu, now at U Caen)
- Thomas Pellisier Tanon (PhD student, 2017-2020, co-advised with Antoine Amarilli, now at his start-up “Lexistems”)
- Jonathan Lajus (PhD student, 2016-2020, now a highschool teacher)
- Julien Romero (PhD student, 2017-2020, co-advised with Nicoleta Preda, now at Télécom SudParis)
- Jérôme Dockès (PhD student, 2016-2019, co-advised with Gaël Varoquaux, now at U Montreal)
- Camille Bourgaux (Postdoc, 2017-2018; now at CNRS)
- Thomas Rebele (PhD student, 2015-2018; now at Orchestra Networks)
- Katerina Tzompanaki (Postdoc in 2016, now associate professor at U Cergy)
- Danai Symeonidou (Postdoc in 2015, now at INRA Montpellier)
- Luis Galárraga (PhD 2012-2016, now at INRIA Rennes)