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: Which military branch that Penson may have served for has more active members? Passage:Penson's professional career began in April 1954 after he had had a successful three-year skein as a pitcher while he served in the military. Penson won 50 games pitching for his base team, although sources disagree about the branch in which he served, reported as the United States Air Force and the U.S. Army. Penson made the Phillies out of training camp in 1954 as a member of the team's early-season, 28-man roster. His five games pitched included three starts, and he split two decisions. His lone MLB win came in his first start, on Sunday, May 16, 1954. in the second game of a doubleheader at Connie Mack Stadium. He went six innings against the St. Louis Cardinals, and allowed four hits, four bases on balls, and one earned run. But he was forced to leave the game leading 6–3 when the game was suspended because of Pennsylvania blue laws prohibiting sporting events on Sunday evenings. The game resumed on Monday, May 17, and Philadelphia went on to win, 8–4; veteran Murry Dickson nailed down the save with three innings of one-run relief.


b