Keyphrases
- natural language
- parse tree
- penn treebank
- syntactic structures
- syntactic analysis
- phrase structure
- linguistic analysis
- highly ambiguous
- syntactic categories
- syntactic parsing
- natural language sentences
- sentence compression
- dependency tree
- tree bank
- natural language processing
- dependency structure
- probabilistic context free grammars
- link grammar
- context free
- dependency parsing
- semantic analysis
- semantic parsing
- natural language parsing
- missing values
- word alignment
- graph grammars
- noisy data
- context free grammars
- relation extraction
- text summarization
- question answering
- linguistic features
- missing data
- extractive summarization
- context sensitive
- language processing
- noun phrases
- tree structures
- semantic role labeling
- sentence level
- dependency parser
- uncertain information
- text corpus
- semantic roles