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: When did Sutherland retire from coaching? Passage:A halfback, Marhefka spent four seasons, 1920 through 1924, on Lafayette's football team under coach Jock Sutherland. In 1921 the squad went undefeated, but the college's president refused to allow them to compete in the Rose Bowl. After graduation, he was picked up by the Pottsville Maroons and played with them during their sole season in the Anthracite League, in which they were the champions. He remained with the team when they joined the National Football League the following year and was with them when, despite having the best record in the league, they were denied the 1925 NFL championship after being controversially suspended. He had a final season in professional football with the 1926 Philadelphia Quakers of the first American Football League, in which they were the champions. Marhekfa appeared in two games for the team during the season.


a