Keyphrases
- information extraction
- natural language processing
- text mining
- relation extraction
- semi structured
- named entity recognition
- precision and recall
- structured data
- free text
- web documents
- machine learning
- ontology based information extraction
- named entities
- conditional random fields
- question answering
- relational learning
- text processing
- open domain
- text summarization
- data extraction
- textual data
- machine translation
- natural language
- website
- web mining
- automatic extraction
- information retrieval