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.

His partner, Sonya was a flight attendant on Flight 815. Sonya was a flight attendant on Flight 815 and Sam's girlfriend. Oscar Talbot is a mysterious man who runs the Christiane I expedition. David Massingham and Tracey R are friends of Sam Thomas that gather information for _him_. <sep>, Pronoun: him <sep>, A: David Massingham <sep>, B: Sam Thomas
Output:
B