Slide 1
Passage Retrieval in
Question Answering
Density Based Passage
Retrieval Method
Our Solution
Measuring Sentence
Similarity
Outline
Outline
What Dependency Parsing
is Like
Extracting Relation Paths
Paired Paths from
Question and Answer
Outline
Measuring Path Match
Degree
Calculating Translation
Probability (Similarity) of Paths
Outline
Training and Testing
Approach 1: MI Based
Approach 2: EM Based
Outline
Evaluation Setup
Comparison Systems
Evaluation Metrics
Performance Evaluation
Performance Variation to
Question Length
Error Analysis
Performance on Top of
Query Expansion
Outline
Conclusions
Q & A