Seminaire: Roberto Navigli, 13 octobre 2014, Universite Paris 13

Thierry Hamon hamon at LIMSI.FR
Sat Oct 11 19:33:37 UTC 2014

Date: Wed, 8 Oct 2014 16:50:24 +0200
From: Aldo Gangemi <aldo.gangemi at>
Message-Id: <E4C428F9-F826-45F1-9C24-8CF1D6A99A0F at>

Chers collègues

dans le cadre de l'opération IA2 (Multilingual Semantic Web Machine
Reading ) du labex EFL (axe 5),

Roberto Navigli
Università di Roma La Sapienza

fera une présentation le lundi 13 octobre de 14h à 16h (suivie par un
Salle B107,  bâtiment B, Institut Galilée
Université Paris 13, 99 avenue Jean-Baptiste Clément, Villetaneuse

Title: (Digital) goodies from the ERC Wishing Well: BabelNet, Babelfy,
video games with a purpose and the Wikipedia bitaxonomy


Multilinguality is a key feature of today’s Web, and it is this feature
that we leverage and exploit in our research work at the Sapienza
University of Rome’s Linguistic Computing Laboratory, which I am going
to overview and showcase in this talk.

I will start by presenting BabelNet 2.5 (, a very
large multilingual encyclopedic dictionary and semantic network, which
covers 50 languages and provides both lexicographic and encyclopedic
knowledge for all the open-class parts of speech, thanks to the seamless
integration of WordNet, Wikipedia, Wiktionary, OmegaWiki, Wikidata and
the Open Multilingual WordNet.

Next, I will present Babelfy (, a unified approach
that leverages BabelNet to perform word sense disambiguation and entity
linking in arbitrary languages, with performance on both tasks on a par
with, or surpassing, those of task-specific state-of-the-art supervised

In the third part of the talk I will present two approaches to
large-scale knowledge acquisition and validation: video games with a
purpose, a novel, powerful paradigm for the large scale acquisition and
validation of knowledge and data, and WiBi (,
our approach to the construction of a Wikipedia bitaxonomy, that is, the
largest and most accurate currently available taxonomy of Wikipedia
pages and a taxonomy of categories, aligned to each other.


Roberto Navigli is an Associate Professor in the Department of Computer
Science of the Sapienza University of Rome. He was awarded the Marco
Cadoli 2007 AI*IA Prize for the best doctoral thesis in Artificial
Intelligence and the Marco Somalvico 2013 AI*IA Prize for the best young
researcher in AI. He is the recipient of an ERC Starting Grant in
computer science and informatics on multilingual word sense
disambiguation (2011-2016) and a co-PI of a Google Focused Research
Award on Natural Language Understanding.
His research lies in the field of Natural Language Processing (including
word sense disambiguation and induction, ontology learning from scratch,
large-scale knowledge acquisition, open information extraction and
relation extraction).
He has served as an area chair of ACL, WWW, and *SEM, and a senior
program committee member of IJCAI. Currently he is an Associate Editor
of the Artificial Intelligence Journal, a member of the editorial board
of the Journal of Natural Language Engineering, a guest editor of the
Journal of Web Semantics, and a former editorial board member of
Computational Linguistics.

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