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file - ChaSen - 奈良先端科学技術大学院大学

file - ChaSen - 奈良先端科学技術大学院大学

file - ChaSen - 奈良先端科学技術大学院大学

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Contents1 Introduction 11.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Focus of this research . . . . . . . . . . . . . . . . . . . . . . . . . 21.3 Guide to remaining chapters . . . . . . . . . . . . . . . . . . . . . 52 Concept and Architecture of Target Question-Answering 72.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2 System architecture of target question-answering . . . . . . . . . . 112.3 Fundamental technologies and related work . . . . . . . . . . . . . 143 Question Type Identification for Multi-Sentence Queries 173.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.2 Question segmentation and type identification . . . . . . . . . . . 193.3 Question type annotation to multi-sentence queries . . . . . . . . 213.3.1 Overview of corpus . . . . . . . . . . . . . . . . . . . . . . 213.3.2 Overview of question type annotation . . . . . . . . . . . . 223.3.3 Analysis of assigned tags . . . . . . . . . . . . . . . . . . . 233.3.4 Combination of question types in a query. . . . . . . . . . 243.3.5 Inter-annotator agreement for question type annotation . . 243.3.6 Question extending beyond more than one sentence . . . . 263.3.7 Sentence containing more than one question item . . . . . 273.4 Chunking-based question segmentation and type identification . . 293.4.1 Chunking . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.4.2 Overview of the proposed technique . . . . . . . . . . . . . 323.4.3 Conditional random field . . . . . . . . . . . . . . . . . . . 33v

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