Keyphrases
- document retrieval
- text summarization
- named entity recognition
- natural language processing
- information extraction
- information retrieval
- question answering
- query expansion
- automatic summarization
- multi document summarization
- document structure
- extractive summarization
- maximum entropy
- keyword extraction
- temporal expressions
- named entities
- information retrieval systems
- automatic text summarization
- computational advertising
- active contours
- text segments
- learning algorithm