Sentence:  The question “Who is the most hilarious person <WSD>QAnon</WSD> could turn out to be?” yielded thousands of responses. Here are the best and most common ones. 
Meaning of the word marked with <WSD> tags:  An anonymous poster on 4chan and 8chan, claiming to possess Q clearance and also known as Q, who originated a pro-Trump conspiracy theory that (Donald Trump) secretly cooperates with (Mueller's Special Counsel investigation) to prosecute prominent Democrats.