Resolution of Data Sparseness in Named Entity Recognition Using Hierarchical Features and Feature Relaxation Principle.
Guodong ZhouJian SuLingpeng YangPublished in: CICLing (2005)
Keyphrases
- data sparseness
- named entities
- feature set
- image features
- co occurrence
- language modeling
- feature vectors
- question answering
- linguistic knowledge
- information extraction
- text mining
- unsupervised learning
- named entity recognition
- feature extraction
- dimensionality reduction
- natural language processing
- classification accuracy
- low level
- language model
- image classification
- knowledge representation
- relation extraction
- expert systems
- machine learning