Keyphrases
- information retrieval
- historical information
- multi lingual
- long term
- information retrieval systems
- past observations
- artificial intelligence
- search engine
- information filtering
- query expansion
- document collections
- question answering
- past experience
- vector space model
- information access
- document retrieval
- text mining
- information extraction
- knowledge discovery
- test collection
- text retrieval
- learning to rank
- data sets
- language processing
- computational linguistics
- decision making
- social networks
- real world