Keyphrases
- named entity recognition
- information extraction
- named entities
- natural language processing
- genia corpus
- maximum entropy
- semi supervised
- conditional random fields
- text summarization
- sequence labeling
- text mining
- relation extraction
- annotated corpus
- classifier ensemble
- information retrieval
- hand coded
- proper names
- maximum entropy classifier
- chinese named entity recognition
- information retrieval systems
- natural language
- knowledge base
- artificial intelligence
- machine learning
- knowledge discovery
- prior knowledge
- pairwise
- data sets