Keyphrases
- question answering
- named entities
- information extraction
- natural language processing
- coreference resolution
- information retrieval
- named entity recognition
- relation extraction
- passage retrieval
- question classification
- question answering systems
- natural language
- cross language
- noun phrases
- qa clef
- structured data
- sentence retrieval
- semantic roles
- syntactic information
- machine learning
- qa systems
- answer extraction
- search engine