Keyphrases
- sentiment analysis
- syntactic features
- opinion mining
- sentiment classification
- text classification
- semantic features
- sentence level
- semantic role labeling
- syntactic structures
- natural language processing
- text mining
- tree kernels
- feature set
- product reviews
- semantic roles
- syntactic information
- sentiment lexicon
- part of speech
- clustering algorithm
- feature selection
- artificial intelligence
- databases