Question: How many major British awards for children's books did this writer, who wrote the  the second episode of the tenth series of the British science fiction television series "Doctor Who," win?  
Sentence (from "Frank Cottrell-Boyce"): Cottrell-Boyce has won two major British awards for children's books, the 2004 Carnegie Medal for "Millions", which originated as a film script, and the 2012 Guardian Prize for "The Unforgotten Coat", which was commissioned by a charity.
Relevant evidence: Yes