Keyphrases
- context free grammars
- tree adjoining
- phrase structure
- context free
- syntactic pattern recognition
- visual languages
- tree bank
- natural language
- grammar induction
- natural language processing
- parse tree
- stochastic context free grammars
- natural language parsing
- grammatical inference
- graph grammars
- stochastic grammar
- context free languages
- context dependent
- natural language sentences
- grammar rules
- context sensitive
- probabilistic context free grammars
- syntactic analysis
- speech understanding
- language processing
- penn treebank
- information extraction
- hidden markov models
- machine learning
- chinese word segmentation
- xml schema
- semantic parsing
- linguistic analysis
- language understanding
- tree structures