Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: Who did the Tar Hells defeat to win the ACC Tournament in 2007? Passage:Williams quickly reloaded the team with top talent, bringing in recruits like Brandan Wright, Ty Lawson, Wayne Ellington and Deon Thompson. The 2006–07 team tied as ACC regular season champions, earning the tiebreak over the Virginia Cavaliers. With the #1 seed, the Tar Heels won the ACC Tournament. After earning a #1 seed in the East Region in the 2007 NCAA Tournament, Williams' team won its first-round game against Eastern Kentucky Colonels 86–65 and its second against Michigan State 81–67. North Carolina then defeated the USC Trojans 74–64 to advance to the Elite Eight. On March 24, 2007, North Carolina fell to the Georgetown Hoyas in overtime in the East Regional, ending its post-season run. Following the 2006–2007 season, Williams announced on July 18, 2007, that he had vertigo, a condition that occasionally forces him to sit down suddenly during games.


b