Definition: In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.
Input: The coin toss ceremony featured Pro Football Hall of Fame receiver Elroy Hirsch. Dolphins captain Bob Kuechenberg called ``tails,'' and the coin came down ``tails.'' However, referee Jerry Markbreit became confused by the similar design of both sides of the coin and incorrectly thought ``heads'' had landed. After a short discussion with _his_ head linesman, Dale Hamer, Markbreit corrected his mistake before the kickoff, then asked Kuechenberg if the Dolphins would receive said kickoff, which they did. <sep>, Pronoun: his

Markbreit