Keyphrases
- context free grammars
- tree adjoining
- phrase structure
- context free
- syntactic pattern recognition
- tree bank
- natural language
- visual languages
- grammar induction
- parse tree
- grammatical inference
- stochastic grammar
- natural language processing
- natural language parsing
- stochastic context free grammars
- graph grammars
- context free languages
- probabilistic context free grammars
- noun phrases
- language processing
- context sensitive
- natural language sentences
- dependency parsing
- semantic parsing
- error recovery
- semantic analysis
- penn treebank
- context dependent
- regular expressions
- speech understanding
- data sets
- bayesian networks
- neural network
- tree grammars
- mildly context sensitive
- syntactic analysis
- grammar rules
- intermediate representation
- semantic representation
- named entities
- knowledge representation
- hidden markov models