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: However, Markbreit became confused by the similar design of both sides of the coin: one side had two helmets and the other side showed two players holding helmets. Thus, he incorrectly thought ``heads'' had landed. When Markbreit became confused, NBC Sports play-by-play announcer Dick Enberg ordered his producer to cut off the microphones surrounding midfield and pull away from the tight shot involving Markbreit, Kuechenburg and Redskins quarterback Joe Theismann. After a short discussion with _his_ head linesman, Dale Hamer, Markbreit corrected his mistake before the kickoff. <sep>, Pronoun: his <sep>, A: Markbreit <sep>, B: Joe Theismann

A