Keyphrases
- context free grammars
- tree adjoining
- context free
- phrase structure
- syntactic pattern recognition
- tree bank
- natural language
- visual languages
- stochastic context free grammars
- parse tree
- grammar induction
- natural language processing
- grammatical inference
- graph grammars
- natural language parsing
- stochastic grammar
- special case
- equivalence queries
- natural language sentences
- finite automata
- approximation algorithms
- semantic parsing
- production rules
- context dependent
- probabilistic context free grammars
- worst case
- knowledge representation
- context sensitive
- dependency parsing
- noun phrases
- computational complexity