Keyphrases
- relation extraction
- named entities
- semantic relations
- named entity recognizer
- automatic extraction
- information extraction
- word pairs
- named entity recognition
- question answering
- structured data
- natural language processing
- co occurrence
- domain specific
- knowledge base
- semantic features
- semantic relationships
- kernel function
- information retrieval
- knowledge based systems
- text mining
- feature selection
- search engine
- artificial intelligence