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Título:	A proposal for Wide-Coverage Spanish Named Entity Recognition
Autor/a:	Arévalo, Montse; Carreras, Xavier; Martí Antonin, M. Antònia; Márquez, Lluís; Padró, Lluís; Simón, María José
Otros autores:	Universitat de Barcelona
Abstract:	This paper presents a proposal for wide--coverage Named Entity Recognition for Spanish. First, a linguistic description of the typology of Named Entities is proposed. Following this definition an architecture of sequential processes is described for addressing the recognition and classification of strong and weak Named Entities. The former are treated using Machine Learning techniques (AdaBoost) and simple attributes requiring non tagged corpora complemented with external information sources (a list of trigger words and a gazetteer). The latter are approached through a context free grammar for recognizing syntactic patterns. A deep evaluation of the first task on real corpora to validate the appropriateness of the approach is presented. A preliminar version of the context free grammar is qualitatively evaluated with also good results on a small hand--tagged corpus.
Materia(s):	-Tractament del llenguatge natural (Informàtica) -Natural language processing (Computer science)
Derechos:	(c) Arévalo, Montse et al., 2002
Tipo de documento:	Artículo Artículo - Versión publicada
Editor:	Sociedad Española para el Procesamiento del Lenguaje Natural (SEPLN)
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