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NASARI: integrating explicit knowledge and corpus statistics for a multilingual representation of concepts and entities

Camacho Collados, Jose, Pilehvar, Mohammad Taher and Navigli, Roberto 2016. NASARI: integrating explicit knowledge and corpus statistics for a multilingual representation of concepts and entities. Artificial Intelligence 240 , pp. 36-64. 10.1016/j.artint.2016.07.005

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Abstract

Owing to the need for a deep understanding of linguistic items, semantic representation is considered to be one of the fundamental components of several applications in Natural Language Processing and Artificial Intelligence. As a result, semantic representation has been one of the prominent research areas in lexical semantics over the past decades. However, due mainly to the lack of large sense-annotated corpora, most existing representation techniques are limited to the lexical level and thus cannot be effectively applied to individual word senses. In this paper we put forward a novel multilingual vector representation, called Nasari, which not only enables accurate representation of word senses in different languages, but it also provides two main advantages over existing approaches: (1) high coverage, including both concepts and named entities, (2) comparability across languages and linguistic levels (i.e., words, senses and concepts), thanks to the representation of linguistic items in a single unified semantic space and in a joint embedded space, respectively. Moreover, our representations are flexible, can be applied to multiple applications and are freely available at http://lcl.uniroma1.it/nasari/. As evaluation benchmark, we opted for four different tasks, namely, word similarity, sense clustering, domain labeling, and Word Sense Disambiguation, for each of which we report state-of-the-art performance on several standard datasets across different languages.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Computer Science & Informatics
Uncontrolled Keywords: Semantic representation, Lexical semantics, Word Sense, Disambiguation,Semantic similarity, Sense clustering Domain labeling
Publisher: Elsevier
ISSN: 0004-3702
Date of First Compliant Deposit: 11 July 2018
Date of Acceptance: 25 July 2016
Last Modified: 19 Jan 2021 09:02
URI: http://orca.cf.ac.uk/id/eprint/113132

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