Keyphrases
- named entity recognition
- information extraction
- named entities
- natural language processing
- conditional random fields
- maximum entropy
- semi supervised
- text summarization
- classifier ensemble
- relation extraction
- annotated corpus
- visual features
- maximum entropy classifier
- sequence labeling
- chinese named entity recognition
- question answering
- unsupervised learning
- image classification
- proper names
- prior knowledge
- information retrieval