Keyphrases
- answering queries
- query processing
- query language
- correct answers
- answer questions
- complex queries
- data sources
- response time
- web search engines
- efficient processing
- range queries
- database queries
- web snippets
- database
- natural language queries
- approximate answers
- user defined
- data streams
- data sets
- web queries
- tree patterns
- expressive power
- nearest neighbor
- answering questions
- natural language questions