Keyphrases
- question answering
- xml documents
- passage retrieval
- information retrieval
- natural language questions
- question answering systems
- syntactic information
- candidate answers
- metadata
- answering questions
- xml data
- document retrieval
- natural language
- natural language processing
- cross language
- named entities
- relevant documents
- information extraction
- question classification
- sql queries
- data model
- xml retrieval
- document collections
- information retrieval systems
- web documents
- text documents
- relational databases
- document clustering
- xml schema
- qa clef
- document classification
- xml databases
- data retrieval
- semi structured
- semantic roles
- query processing
- answer validation
- vector space model
- structured data
- keywords
- artificial intelligence