Unni Cathrine Eiken February 2005

Table of Contents
1 INTRODUCTION AND PROBLEM STATEMENT 1
1.1 Project outline 3
2 THEORETICAL BACKGROUND 6
2.1 Anaphora resolution 6
2.1.1 Frameworks for anaphora resolution 8
2.1.2 Computational approaches to anaphora resolution 12
2.1.3 Anaphora resolution and text summarisation 22
2.2 Finding meaning in the context 24
2.2.1 The distributional approach 24
2.2.2 Different types of context 27
2.2.3 Context and selectional restrictions 30
3 FROM TEXT TO EPAS – THE EXTRACTION METHOD 33
3.1 Selecting the texts 33
3.2 Predicate-argument structures 35
3.2.1 What is represented in the EPAS? 39
3.3 Parsing with NorGram 42
3.3.1 NorGram in outline 43
3.3.2 Extracting EPAS from NorGram 44
3.4 Altering the source 47
3.5 Finding the words 48
3.6 Evaluation of the data set 52
3.6.1 Errors from the grammar 52
3.6.2 Irrelevant structures 53
3.6.3 Manually added structures 54
3.6.4 Comments about the EPAS list 55
4 CLASSIFICATION 58
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