You will be given a definition of a task first, then some input of the task.
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.

By 1969, Gianturco had given up his teaching responsibilities and focused on research. With radiologists Sidney Wallace and Gerald D. Dodd, Gianturco helped to establish the John S. Dunn Sr. Foundation Center for Research in Radiological Sciences. Retaining a senior consultant position at the Carle Clinic even during _his_ years at MD Anderson, he spent summers in Illinois for most of his later career, but he always returned to Texas before the cold weather hit Illinois. <sep>, Pronoun: his <sep>, A: Gianturco <sep>, B: MD Anderson
Output:
A