Keyphrases
- information retrieval
- information retrieval systems
- information access
- language model
- named entities
- document collections
- search engine
- information extraction
- ir evaluation
- entity search
- language modeling
- retrieval model
- document retrieval
- knowledge base
- retrieval systems
- query expansion
- term weighting
- entity retrieval
- entity identification
- data sets
- relevant documents
- test collection
- question answering
- learning to rank
- information filtering
- language processing
- digital libraries
- web search