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:`.

CONTEXT: Bran is believed to be dead. When Robb marches to war, Theon Greyjoy betrays the Starks and takes Winterfell. Bran and Rickon escape. Theon eventually has two boys slain at a farm and says that they were Bran and Rickon. As far as the greater world knows, all the Stark men are dead, which leaves Sansa (the oldest girl) as the heir to Winterfell. Whoever marries her will become Lord of that region.  <sep>  Q: Why is Sansa Stark so important?
Yes

CONTEXT: He didn't have any solid leads to go on. He didn't know where he was being kept before he eavesdropped on Malcolm and he only did that because he was following his mother after she reacted strangely on the news Walter was dead. He only got that news after his last act of cleaning up the neighbourhood got him the clue he needed. If he knew where he was in the first place, he wouldn't of believed the mob guy (saying Walter was dead).  <sep>  Q: Why didn't Oliver Queen rescue Walter sooner than he did? A: He didn't have any solid leads to go on  <sep> FOLLOWUP_Q: Do you feel he was tentative?
No

CONTEXT: The message of American History X is quite simple: violence begets violence. The whole film is a series of escalations based on revenge; Derek and Danny lose their father and hate consumes them. They win a basketball game against the black gang (and their turf in the process) and the gang try and steal their fathers' truck as revenge, Derek kills them over it. But then Derek's arrest interrupts this pattern, he goes off to prison and with the help of Dr. Sweeney he realises the pattern of behaviour and does what he can to prevent it from going any further. Derek has his catharsis and becomes a different person, and tries to help Danny do the same. But the problem is the same hasn't happened to those that he's wronged; there are still people out there from the black gang who have lost friends and blame them both for it, and in the end Danny pays the price. It is much more poignant and reflective of real life in this way, after years of fighting it's not so simple to drop everything and get the happy ending Hollywood has taught us is waiting.  <sep>  Q: Why did American History X end so unexpectedly? A: The message of American History X is quite simple: violence begets violence  Q: But why did the movie end in such an unexpected way? A: there are still people out there from the black gang who have lost friends and blame them both for it  Q: What was the central theme of the movie? A: The whole film is a series of escalations based on revenge  Q: Does the movie portray revenge as a justified action? A: Derek's arrest interrupts this pattern, he goes off to prison and with the help of Dr. Sweeney he realises  Q: What does he realize? A: the pattern of behaviour and does what he can to prevent it from going any further  <sep> FOLLOWUP_Q: Is he successful at preventing it given the younger brother's death?

Yes