Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- pseudo relevance feedback
- ir evaluation
- question answering systems
- blog opinion retrieval
- trec web
- biomedical information retrieval
- query performance prediction
- relevance judgments
- relevance feedback
- expert search
- relevance judgements
- short queries
- retrieval systems
- query expansion
- natural language processing
- reuters corpus volume