You will be given a definition of a task first, then some input of the task.
Read the passage and find the corresponding person for the given pronoun. The word between ** ** is the target pronoun.

He has written four full episodes of Doctor Who, ``The Shakespeare Code'' in 2007, ``The Unicorn and the Wasp'' in 2008, ``The Lodger'' in 2010 and ``Closing Time'' in 2011. Roberts also co-wrote, with Russell T Davies, ``Invasion of the Bane'', the pilot episode of the Doctor Who spin-off series The Sarah Jane Adventures. **He** wrote two two-part stories for the full series of The Sarah Jane Adventures, which began broadcasting in the autumn of 2007, and another two two-part stories for the 2008 series.
Output:
Roberts