1. Finding question–answer pairs from online forums;Cong,2008
2. Extracting chatbot knowledge from online discussion forums;Huang,2007
3. Answer extraction as sequence tagging with tree edit distance.;Yao,2013
4. Extracting chinese question–answer pairs from online forums;Wang,2009
5. Thread-level information for comment classification in community question answering.;Barrón-Cedeño,2015