Keyphrases
- latent variables
- open domain
- probabilistic model
- information extraction
- posterior distribution
- random variables
- question answering
- topic models
- prior knowledge
- latent variable models
- structural svms
- hidden variables
- latent space
- natural language
- question answering systems
- text categorization
- text documents
- expectation maximization
- graphical models
- bayesian networks
- observed variables
- data mining