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: The jury was played a recording of Stewart's telephone call to the police in which he reported Bailey missing; when asked to describe her he could not recall the colour of her eyes, had to look up both her mobile phone number and date of birth, and was unable to give the address of their holiday home in Kent. Eileen Bailey (Helen's mother) testified that Helen had been concerned that she was sleeping excessively, and about her state of mind. The prosecution stated that traces of anti-insomnia medication had been found in Bailey's body. Giving evidence in _his_ defence, Stewart claimed that Bailey and her dog had been kidnapped on 11 April 2016 by two men called Nick and Joe, saying that he had not told the police about this ``to keep Helen safe'' and that the kidnappers had demanded a ransom of *500,000. <sep>, Pronoun: his

Stewart