Keyphrases
- test collection
- information retrieval
- question answering
- retrieval effectiveness
- trec web
- ir evaluation
- biomedical information retrieval
- computer science
- blog opinion retrieval
- relevance judgements
- search tasks
- ad hoc retrieval
- question answering systems
- expert search
- evaluation campaigns
- artificial intelligence
- data sets
- relevance judgments
- relevance assessments
- conference proceedings
- pseudo relevance feedback
- okapi bm
- natural language
- trec blog track