Question Answering Passage Retrieval Using Dependency Parsing

August 17, 2005

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Training and Testing

Testing

Training

Sim ( Q, Sent ) = ?

Relation

Mapping

Scores

Prob ( PSent | PQ ) = ?

P ( Rel (Sent) | Rel (Q) ) = ?

Q - A pairs

Paired Relation Paths

Relation Mapping Model

Similarity between relation vectors

Similarity between individual relations

1.Mutual information (MI) based

2.Expectation Maximization (EM) based