Keyphrases
- named entities
- named entity recognition
- co occurrence
- information extraction
- named entity extraction
- relation extraction
- question answering
- natural language processing
- text mining
- linguistic features
- artificial intelligence
- unsupervised learning
- annotated corpus
- maximum entropy model
- person names
- web news
- noun phrases
- weakly supervised
- databases
- reinforcement learning
- contextual features
- machine learning
- information retrieval
- face recognition