Detailed Instructions: In this task, you will be presented with a text, a pronoun from the text, and two candidate names. You should determine what the pronoun refers to and classify the answers into A, B, or Neither. A and B here are referring to option A and option B. Position of the pronoun in the text is showed within two "_"s.
Q: Subsequent studies with Nadia Boulanger, Luigi Dallapiccola, Darius Milhaud, Paul Hindemith, and Philip Bezanson in composition, William Steinberg and Leonard Bernstein in conducting, and Hugo Kortschak and Ivan Galamian on violin took Yannatos to Yale University (B.M., M.M.), the University of Iowa (Ph.D.), Aspen, Tanglewood, and Paris. As a young violinist, _he_performed at the Casals Festival and elsewhere in various professional ensembles, including a piano trio, a string quartet, and early music groups with Hindemith and Boulanger. <sep>, Pronoun: he <sep>, A: Ivan Galamian <sep>, B: Yannatos
A:
B