Keyphrases
- named entities
- information extraction
- named entity recognition
- named entity extraction
- co occurrence
- relation extraction
- question answering
- natural language processing
- text mining
- global context
- annotated corpus
- text documents
- web news
- noun phrases
- unsupervised learning
- chinese named entity recognition
- data sets
- person names
- semantic classes
- artificial intelligence
- maximum entropy
- conditional dependencies
- news corpus
- data analysis
- information retrieval