Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- ad hoc retrieval
- expert search
- pseudo relevance feedback
- retrieval model
- relevance feedback
- natural language
- question answering systems
- learning algorithm
- relevance judgements
- ir evaluation
- trec blog track
- average precision
- neural network
- artificial intelligence
- short queries
- evaluation campaigns
- document rankings
- trec web