Definition: Given a paragraph about movies and a set of conversational questions and answers about the paragraph, say whether the passage contains sufficient information to answer the follow-up question. Say Yes if it is answerable; otherwise, say No. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`, and the follow-up question has a prefix `FOLLOWUP_Q:`.
Input: CONTEXT: It is as simple as Ivan is Trevor's guilt, manifested into a human hallucination. He uses Ivan's supposed mysteriousness to start blaming his distractions and his recent obsession over who is out to get him when really Ivan does not exist at all. Fight Club spoilers explain this best: In a way it is like the ending of Fight Club where The Narrator turns out to be Tyler Durden. In the end, the picture that he kept claiming was Ivan, was really him. The picture is taken before his accident and shows how Trevor was before the guilt of killing a child started seeping into him and causing him to lose sleep for a year. Notice that Ivan is finally gone from his life when he finally turns himself in for what he has done and is also able to finally sleep.  <sep>  Q: How come Ivan exists in the Machinist? A: It is as simple as Ivan is Trevor's guilt, manifested into a human hallucination  Q: Why is he a part of Trevor's imagination at all? A: He uses Ivan's supposed mysteriousness to start blaming his distractions and his recent obsession over  <sep> FOLLOWUP_Q: Are there any clues in the movie that Ivan is a real part of Travor's past?

Yes