instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
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?
answer:
BBC Four


question:
Context : ``Intro to Knots'' is the tenth episode of the fourth season of the NBC sitcom Community, which originally aired on April 18, 2013. 
Question : Which series is Intro to Knots apart of?
answer:
Community


question:
Context : The Sinclair Cambridge was a pocket-sized calculator introduced in August 1973 by Sinclair Radionics. 
Question : What year is Sinclair Cambridge associated with?
answer:

1973