Keyphrases
- search engine
- question answering
- information retrieval
- question answering systems
- natural language processing
- question classification
- syntactic information
- cross language
- natural language
- natural language questions
- passage retrieval
- relation extraction
- named entities
- information extraction
- semantic roles
- multi modal
- qa clef
- answering questions
- answer validation
- textual entailment recognition
- search sessions
- language model
- answer extraction
- open domain question answering