TAILIEUCHUNG - Báo cáo khoa học: "Supervised Noun Phrase Coreference Research: The First Fifteen Years"

The research focus of computational coreference resolution has exhibited a shift from heuristic approaches to machine learning approaches in the past decade. This paper surveys the major milestones in supervised coreference research since its inception fifteen years ago. | Supervised Noun Phrase Coreference Research The First Fifteen Years Vincent Ng Human Language Technology Research Institute University of Texas at Dallas Richardson TX 75083-0688 vince@ Abstract The research focus of computational coreference resolution has exhibited a shift from heuristic approaches to machine learning approaches in the past decade. This paper surveys the major milestones in supervised coreference research since its inception fifteen years ago. 1 Introduction Noun phrase NP coreference resolution the task of determining which NPs in a text or dialogue refer to the same real-world entity has been at the core of natural language processing NLP since the 1960s. NP coreference is related to the task of anaphora resolution whose goal is to identify an antecedent for an anaphoric NP . an NP that depends on another NP specifically its antecedent for its interpretation see van Deemter and Kibble 2000 for a detailed discussion of the difference between the two tasks . Despite its simple task definition coreference is generally considered a difficult NLP task typically involving the use of sophisticated knowledge sources and inference procedures Charniak 1972 . Computational theories of discourse in particular focusing see Grosz 1977 and Sidner 1979 and centering Grosz et al. 1983 1995 have heavily influenced coreference research in the 1970s and 1980s leading to the development of numerous centering algorithms see Walker et al. 1998 . The focus of coreference research underwent a gradual shift from heuristic approaches to machine learning approaches in the 1990s. This shift can be attributed in part to the advent of the statistical NLP era and in part to the public availability of annotated coreference corpora produced as part of the MUC-6 1995 and MuC-7 1998 conferences. Learning-based coreference research has remained vibrant since then with results regularly published not only in general NLP conferences but also in specialized .

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