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: 1959 also saw the release of the Hollywood film Green Mansions, set in a South American jungle and based on a 1904 best seller by the writer and naturalist, W. H. Hudson. It was directed by Mel Ferrer and starred Anthony Perkins and Audrey Hepburn as Rima the bird girl. The credits list ``Primitive music courtesy of Pierre Gaisseau and Alan Lomax.'' In 1959-60 Gaisseau embarked on the New Guinea expedition documented in _his_ most celebrated film, Le Ciel et la boue (The Sky Above and the Mud Below). <sep>, Pronoun: his

Pierre Gaisseau