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Báo cáo khoa học: "Measuring frame relatedness"

In this paper we introduce the notion of “frame relatedness”, i.e. relatedness among prototypical situations as represented in the FrameNet database. We first demonstrate the cognitive plausibility of that notion through an annotation experiment, and then propose different types of computational measures to automatically assess relatedness. Results show that our measures provide good performance on the task of ranking pairs of frames. | Measuring frame relatedness Marco Pennacchiotti Yahoo Inc. Santa Clara CA 95054 pennac@yahoo-inc.com Michael Wirth Computational Linguistics Saarland University Germany miwirth@coli.uni-sb.de Abstract In this paper we introduce the notion of frame relatedness i.e. relatedness among prototypical situations as represented in the FrameNet database. We first demonstrate the cognitive plausibility of that notion through an annotation experiment and then propose different types of computational measures to automatically assess relatedness. Results show that our measures provide good performance on the task of ranking pairs of frames. 1 Introduction Measuring relatedness among linguistic entities is a crucial topic in NLP. Automatically assessing the degree of similarity or relatedness between two words or two expressions is of great help in a variety of tasks such as Question Answering Recognizing Textual Entailment RTE Information Extraction and discourse processing. Since the very beginning of computational linguistics many studies have been devoted to the definition and the implementation of automatic measures for word relatedness e.g. Rubenstein and Goodenough 1965 Resnik 1995 Lin 1998 Budanitsky and Hirst 2006 Mohammad and Hirst 2006 . More recently relatedness between lexical-syntactic patterns has also been studied Lin and Pantel 2001 Szpektor et al. 2004 to support advanced tasks such as paraphrasing and RTE. Unfortunately no attention has been paid so far to the definition of relatedness at the more abstract situational level - i.e. relatedness between two prototypical actions events or state-of-affairs taken out of context e.g. the situations of Killing and Death . A prominent definition of prototypical situation is given in frame semantics Fillmore 1985 where a situation is modelled as a conceptual structure a frame con stituted by the predicates that can evoke the situation and the semantic roles expressing the situation s participants. As measures of word .