Keyphrases
- named entities
- named entity recognition
- information extraction
- named entity extraction
- co occurrence
- relation extraction
- natural language processing
- question answering
- annotated corpus
- text mining
- text documents
- noun phrases
- metadata
- weakly supervised
- linguistic features
- unsupervised learning
- maximum entropy model
- web news
- person names
- artificial intelligence
- high dimensional
- pairwise
- proper names