Keyphrases
- trec web track
- test collection
- search engine
- topic distillation
- query logs
- anchor text
- web search
- document collections
- information retrieval
- relevant documents
- language model
- search tasks
- web search engines
- retrieval systems
- learning to rank
- website
- relevance assessments
- probabilistic model
- user queries
- social network analysis
- ad hoc retrieval