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: How many bands competed in the Union Grove Fiddler's Convention competition against John Herald and his band? Passage:In 1958, Herald formed The Greenbriar Boys, along with Bob Yellin (banjo) and Paul Prestopino (mandolin). The following year, Eric Weissberg (mandolin and fiddle), replaced Prestopino, and Weissberg was soon replaced by Ralph Rinzler (mandolin) to form their most successful combination. Herald was lead guitarist and vocalist. The trio often played the Greenwich Village scene, but were notable enough to be the first Northern group to win the likes of the Union Grove Fiddler's Convention competition, where Yellin also took top honors for banjo. Shortly after backing Joan Baez on her second LP, The Greenbriar Boys were signed to Vanguard Records, for whom they released three records. In 1969, Linda Ronstadt recorded Herald's "High Muddy Water." Two years previously, she had recreated his vocal of Mike Nesmith's "Different Drum," which became a hit for her band the Stone Poneys.


a