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 won the 2011 Belfast West by-election? Passage:When aged 16, Carroll fund-raised with fellow activists to travel to Edinburgh for the Make Poverty History protest. He contested the 2011 Belfast West by-election—triggered by the resignation of Gerry Adams—for the People Before Profit, and won 7.6% of the vote. At the 2014 Belfast City Council election he gained one of the seven seats in the Black Mountain electoral area from Sinn Féin, coming third. Following his election, he said that he did not describe himself as a nationalist or a unionist, instead choosing to identify as a socialist. He said: "There is a lot of anger in West Belfast at the minute over the situation at Royal Victoria Hospital's A&E, the privatisation of leisure centres and the Casement Park issues...residents have been trampled on". He contested Belfast West again at the 2015 general election, this time coming second, gaining 19.2% of the vote and reducing the Sinn Féin majority from 57.1% to 35.0%.


a