Semantic Extensions of the Ephyra QA System for TREC 2007.
Nico SchlaeferJeongwoo KoJustin BetteridgeManas A. PathakEric NybergGuido SautterPublished in: TREC (2007)
Keyphrases
- question answering
- natural language
- question answering systems
- information retrieval
- open domain question answering
- answer extraction
- semantic roles
- open domain
- semantic web
- test collection
- question classification
- semantic annotation
- semantic features
- semantic search
- semantic description
- semantic representation
- semantic similarity
- semantic information
- information extraction
- passage retrieval
- semantic knowledge
- question answer
- high level