2021 Fiscal Year Final Research Report
Construction of Japanese Predicate-Argument Structure Dictionary for Natural Language Processing and Linguistic Analysis with Concordancer
| Project/Area Number |
19K00552
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 02060:Linguistics-related
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| Research Institution | Okayama University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | コンコーダンサ / 述語項構造 / ブロックベース / 意味役割 / 概念フレーム / パターンマッチ |
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| Outline of Final Research Achievements |
First, we incorporate the semantic role system defined in PropBank into the Predicate-argument structure Thesaurus. This extension allows us to capture the semantic relations between predicates and their arguments even in different constructions, such as the causative, passive and adversative passive forms, by describing both numbered arguments and named arguments (e.g., Agent and Theme). The dictionary entries have also been maintained and published on the website. Second, for construction of automatic annotation system of predicate-argument structures, we have applied various kinds of models such as deep learning models and models based on Bayes' theorems and revealed the approaches to improve the performance. Finally, we have developed a concordancer using an automatic annotation system of predicate-argument structures. In the concordancer, the users can combine block-based patterns that allow us to extract matched texts .
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| Free Research Field |
自然言語処理
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| Academic Significance and Societal Importance of the Research Achievements |
本研究成果の中心的な意義は，従来，言語学における語彙意味論の中で議論されてきた意味役割と概念フレームといった述語項構造を実際に工学的に作成し応用システムまで開発したことである．PropBank形式を体系に導入することで，日本語特有の構文である被害受身などを同じ枠組でどのように記述するかを明らかにして国際会議で発表した．また，日本語の述語項構造を利用したアプリケーションとしてコンコーダンサを実装したことは，語彙意味論の成果を使える形で利用できる新たな枠組を提案したことになる．言語学習者などが言語表現を探す際に利用できるシステムになっており，言語理論を社会で利用する一例を具体的に示した．
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