Sentence:On the other, there's the man of letters Jim, a stalwart of book festivals from Edinburgh to Richmond, the [e1]author[/e1] of an acclaimed [e2]study[/e2] on the progress of music, chairman of last year's Man Booker Prize and the presenter of the long-running Radio 4 series Book Club.
 e1: author. 
 e2 : study.
Answer: Product-Producer(e2,e1)