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: Ma Xiu (died 211) was the son of the warlord Ma Teng during the late Han Dynasty period of Chinese history. When his older brother Ma Chao rebelled against Cao Cao, Ma Xiu and _his_ father were executed. <sep>, Pronoun: his

Ma Xiu