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: At night, Ellie catches Riley attempting to sneak out of the school, and demands to accompany her. Riley reluctantly agrees, and the two make their way to the mall, where they meet Riley's friend Winston. As Winston teaches Ellie how to ride a horse, Riley steals _his_ radio, and discovers that an attack by the Fireflies--a rebel group opposing the quarantine zone authorities--has occurred nearby. <sep>, Pronoun: his

Winston