Definition: 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.
Input: In the early 1960s, he joined the Grands Ballets Canadiens, then led by Ludmilla Chiriaeff, where he danced for several years. On returning to London in the late sixties, he took over Kathleen Crofton's London students, when Alicia Markova invited Crofton to join _her_ as ballet mistress at the Metropolitan Opera in New York. <sep>, Pronoun: her <sep>, A: Kathleen Crofton <sep>, B: Alicia Markova

B