| Abstract | Extracting contexts and answers together with the questions will yield not only a coherent forum summary but also a valuable QA knowledge base . |
| Introduction | Another motivation of detecting contexts and answers of the questions in forum threads is that it could be used to enrich the knowledge base of community-based question and answering (CQA) services such as Live QnA and Yahoo! |
| Introduction | To enrich the knowledge base , not only the answers, but also the contexts are critical; otherwise the answer to a question such as How much is the taxi would be useless without context in the database. |