Keyphrases
- natural language
- parse tree
- penn treebank
- syntactic structures
- syntactic analysis
- linguistic analysis
- phrase structure
- highly ambiguous
- link grammar
- syntactic parsing
- natural language sentences
- semantic parsing
- syntactic categories
- probabilistic context free grammars
- dependency tree
- natural language processing
- dependency structure
- tree bank
- dependency parsing
- multi document summarization
- context free
- natural language parsing
- context free grammars
- semantic analysis
- sentence compression
- context dependent
- text classification
- machine learning
- unsupervised learning
- noun phrases
- word alignment