1. Snowball: Extracting relations from large plain-text collections;Agichtein,2000
2. Improving an ontology refinement method with hyponymy patterns;Alfonseca,2002
3. Open information extraction from the web;Banko,2007
4. Using the web to reduce data sparseness in pattern-based information extraction;Blohm,2007
5. Harvesting relations from the web-quantifying the impact of filtering functinons;Blohm,2007