Keyphrases
- query language
- database
- spam filtering
- instant messaging
- query processing
- web search engines
- user queries
- query logs
- email messages
- electronic mail
- range queries
- anti spam
- efficient processing
- enron email
- text mining
- response time
- complex queries
- email classification
- answering queries
- query formulation
- communication tools
- retrieval systems
- data streams
- search engine