Keyphrases
- information extraction
- machine learning
- information retrieval
- data sets
- software tools
- news stories
- natural language processing
- precision and recall
- news articles
- semi structured
- evaluation criteria
- domain specific
- co occurrence
- text mining
- end users
- social media
- artificial intelligence
- online news
- event extraction
- extracting meaningful
- evaluation method
- web mining
- monitoring system
- structured data
- question answering
- probabilistic model
- video sequences