Keyphrases
- question answering
- syntactic information
- natural language
- sentence retrieval
- semantic roles
- text summarization
- natural language processing
- information retrieval
- cross language
- information extraction
- question classification
- passage retrieval
- natural language questions
- named entities
- question answering systems
- sentence level
- vector space
- relation extraction
- knowledge representation
- open domain question answering
- semantic role labeling
- semantic analysis
- relational databases
- semantic parsing
- qa clef
- data mining
- retrieval systems