1. A method for a web conference system, the method comprising: detecting a question from a first participant in a web conference, wherein the web conference includes one or more participants; determining whether one or more existing threads relate to the question, wherein the one or more existing threads includes one or more question and answer sets, and wherein determining whether one or more existing threads relate to the question further comprises determining whether one or more keywords contained in the question are present in the one or more question and answer sets of the one or more existing threads; and based on determining that one or more existing threads relate to the question, associating the one or more existing threads with the question, wherein one or more steps of the above method are performed using one or more computers.