Keyphrases
- ir evaluation
- patent retrieval
- test collection
- information retrieval
- web retrieval
- question answering
- passage retrieval
- graded relevance
- evaluation framework
- retrieval effectiveness
- relevance assessments
- retrieval model
- patent documents
- open domain
- query expansion
- evaluation measures
- retrieval systems
- information retrieval systems
- open domain question answering
- answer extraction
- statistical significance
- web search
- prior art
- document collections
- information extraction
- question answer
- evaluation metrics
- evaluation methodology
- query translation
- average precision
- text retrieval
- document retrieval
- relevant documents
- relevance feedback
- search engine