User churn in focused question answering sites: characterizations and prediction.
Jagat Sastry PudipeddiLeman AkogluHanghang TongPublished in: WWW (Companion Volume) (2014)
Keyphrases
- question answering
- natural language questions
- natural language processing
- information extraction
- cross language
- information retrieval
- passage retrieval
- named entities
- natural language
- question classification
- relation extraction
- syntactic information
- question answering systems
- qa clef
- open domain question answering
- relevance feedback
- answer validation
- user queries
- relational databases
- knowledge base
- candidate answers
- sentence retrieval
- data mining