Keyphrases
- text summarization
- lexical chains
- named entity recognition
- natural language processing
- information extraction
- question answering
- news articles
- multi document summarization
- automatic summarization
- text segments
- document structure
- temporal expressions
- extractive summarization
- keyword extraction
- news stories
- query expansion
- keywords
- named entities
- higher order
- automatic text summarization
- user generated content
- learning algorithm
- information retrieval systems
- knowledge base