Refining Grammars for Parsing with Hierarchical Semantic Knowledge.
Xiaojun LinYang FanMeng ZhangXihong WuHuisheng ChiPublished in: EMNLP (2009)
Keyphrases
- semantic knowledge
- context free grammars
- natural language
- semantic information
- natural language text
- context free
- tree adjoining
- syntactic pattern recognition
- parse tree
- domain knowledge
- natural language processing
- knowledge sources
- graph grammars
- grammar induction
- phrase structure
- concept hierarchy
- semantic constraints
- tree bank
- domain ontology
- hierarchical structure
- unsupervised learning
- information extraction
- data sets
- wordnet
- high level
- learning algorithm