1. A method implemented by an information handling system that includes a memory and a processor, the method comprising: selecting a question from a post in a threaded discussion; automatically identifying an answer to the selected question from one or more crowd-based sources, wherein the identified answer has a confidence level greater than a threshold; revising the selected question based on a lexical answer type (LAT) of the selected question; building an answer key with the revised selected question and the identified answer; and automatically training a question answering (QA) system using the answer key.