Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: When did the first African American  sing a the Metropolitan Opera? Passage:Past exhibits have included: Tchaikovsky, in honor of his trip to New York City for the opening of Carnegie Hall; Marian Anderson, the first African American to sing at the Metropolitan Opera; George and Ira Gershwin, in honor of the centennial of George's birth; and one on Leonard Bernstein, among others. The museum's collection also includes a number of items of interest to music lovers: a program from the Vienna Philharmonic's debut concert on March 28, 1842, a ring owned by Beethoven, a pair of Johannes Brahms's eyeglasses, one of Richard Strauss's notebooks, which contained sketches of Danube, an unfinished poem as well as one of Benny Goodman's clarinets and one of Toscanini's batons. It also includes a sequinned jacket owned and worn by Judy Garland and the trowel used in laying the cornerstone of Carnegie Hall.


a