Keyphrases
- question answering
- natural language
- answering questions
- named entities
- question classification
- information retrieval
- natural language processing
- information extraction
- syntactic information
- knowledge base
- knowledge representation
- relation extraction
- cross language
- candidate answers
- question answering systems
- semantic roles
- multi modal
- natural language questions
- qa clef
- sentence retrieval
- qa systems
- passage retrieval
- textual entailment recognition
- feature weighting
- answer extraction
- text mining
- artificial intelligence