1. Natural Language Processing
Coreference Resolution
Andrew Tran, Summer 09

2. What is Coreference Resolution?
Coreference occurs when multiple expressions in a document have the same referent.
Examples:
-Bob’s dog is hungry. It ate the cat.
“dog” refers to “dog” , “It” also refers to “dog”
-Bob’s friend is Bill. He is hungry.
ambiguous
Andrew Tran, Summer 09

3. How is Coreference Resolution Handled?
Common strategies and heuristics:
Gender, Number and Person Agreement
Semantic Consistency
Statistical and Clustering methods
State of the art coreference programs have around ~75% accuracy.
Andrew Tran, Summer 09

4. My Project
Andrew Tran, Summer 09

5. Andrew Tran, Summer 09

6. Andrew Tran, Summer 09

7. Andrew Tran, Summer 09

8. Will focus on pronoun resolution to start with
In addition to commonly used constraints and heuristics, we will apply some tree matching strategies.
Example:
Bob’s dog is hungry. It ate the cat.
Andrew Tran, Summer 09

9. Future Work
Andrew Tran, Summer 09