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: He then became a pupil of Darius Milhaud at Mills College. Hoiby became influenced by a variety of composers, particularly personalities in the twentieth century avant garde, including the Pro Arte String Quartet led by Rudolf Kolisch, brother-in-law of Arnold Schoenberg. During _his_ youth, Hoiby played with Harry Partch's Dadaist ensembles. <sep>, Pronoun: his

Hoiby