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: This break through might look a little vague but still there was a shot in the dark for Sean and Whitey. The only connection they could make from the case was that the shot fired to kill Katie was fired using the gun of 'Just Ray'. So there was a possibility that someone from the Harris household would have committed the crime. However the elder Harris had passed his polygraph with flying colors as mentioned by Sean. When they went to question Katie's boyfriend Brendan for the first time at his house they had met the Harris junior with his friend John O'shea too. After listening to the 911 tape they found out that the boys knew more about the murder. Hence they might have taken a wild guess that mute Harris junior might have access to that gun and he was always with his friend John. Although it looks to be exaggerated but for investigative purpose they went to meet him. One more feasible explanation can be that after listening to the tape Sean and Whitey had gone to question Brendan about those two boys whom Katie might have known or have grudge against. But at the time they entered John had already drawn a gun over Brendan. Once police got them they confessed everything.  <sep>  Q: In Mystic River, How did listening to the 911 tape solve the case?

Yes