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: What team did the Phillies defeat in the world series that marked the beginning of a run of success for Philadelphia sports teams? Passage:Philadelphia sports teams had enjoyed a run of success. Major League Baseball's Phillies won the 1980 World Series and the 1983 National League pennant; the National Hockey League's Flyers won back-to-back Stanley Cups in and , and appeared in the finals in , , , and ; the National Football League's Eagles appeared in Super Bowl XV following the 1980 season, losing to the Oakland Raiders; and the National Basketball Association's 76ers swept the 1983 NBA Finals, as well as making the finals in , , and . Before 1980, the Phillies had appeared in only two other World Series, in and , and the Eagles had won no NFC conference championships since the 1966 agreement that had created the Super Bowl, while the 76ers won NBA titles in both Philadelphia and in their previous incarnation, the Syracuse Nationals. The Villanova Wildcats won the 1985 NCAA Division I Men's Basketball tournament, in one of the most famous upsets in sports history. Construction on One Liberty Place began in 1985, two years after the last championship season in Philadelphia.


b