Generate a correct and concise answer for the question based on the words in the context.

Example Input: Context : Charlie Brooker's Screenwipe is a British television review programme created and presented by Charlie Brooker and broadcast on BBC Four. 
Question : What channel aired Charlie Brooker's Screenwipe?
Example Output: BBC Four

Example Input: Context : By the start of World War II Heinz Hämel had been promoted to Oberscharführer (Technical Sergeant) and was a platoon commander. 
Question : Which war did Heinz Hämel serve in?
Example Output: World War II

Example Input: Context : Lead Balloon is a British television series produced by Open Mike Productions for BBC Four. 
Question : Which network is Lead Balloon a part of?
Example Output:
BBC Four