Keyphrases
- entity ranking
- expert search
- test collection
- question answering
- ad hoc retrieval
- named entities
- natural language processing
- xml retrieval
- entity extraction
- information retrieval
- information extraction
- link structure
- relevant documents
- retrieval effectiveness
- query expansion
- ranked list
- keywords
- pseudo relevance feedback
- natural language
- retrieval model
- relevance assessments
- average precision
- language model
- text mining
- text documents
- document collections
- retrieval systems
- relevance judgments
- web search
- relation extraction
- part of speech
- co occurrence
- text processing
- information retrieval systems
- semi structured
- information sources
- data fusion