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: When Rutherford commission portraits of past presidents were commissioned for the White House, Lucy insisted that paintings of both Martha Washington and Dolley Madison also grace the walls of the presidential mansion. Lucy's own official portrait by Daniel Huntington was commissioned by the Woman's Christian Temperance Union. On _his_ 48th birthday, Rutherford wrote to Lucy, ``My life with you has been so happy--so successful--so beyond reasonable anticipations, that I think of you with a loving gratitude that I do not know how to express.'' <sep>, Pronoun: his

Rutherford