Research Issues Worthy of Exploration

1) The integrated use of multiple kinds of analysis, features, and features at different semantic levels

- Full natural language parsing vs shallow parsing

2) Combining induced rules and patterns with hand-crafted rules

3) Probabilistic framework for extraction

- Confidence measures for rules and extracted data

4) Specific tasks such as use of coreference analysis

5) Spatial and temporal grounding

6) Limitations of induction based approaches

7) Induction of rules in more expressive languages