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: Sam loses his powers whenever he stops drinking demon blood. Bobby and Dean made him go through a detox in order to get all of the demon blood out of him. It looks like this happened some time in season 4 after Dean came back. However in at least one episode Sam intentially drank demon blood for one reason or another and ends up going through detox again. At the end of season 5 we see him drinking gallons of demon blood to prepare him to host Lucifer so that they can capture him.  <sep>  Q: When does Sam lose his psychic powers? A: Sam loses his powers whenever he stops drinking demon blood  Q: What show is this? A: season 4  Q: Who are the main characters? A: Bobby and Dean  Q: Which season does he lose his powers? A: season 4  <sep> FOLLOWUP_Q: Was it when Sam was brought back from hell?

Yes