Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

[Q]: Context : An RGB color space is any additive color space based on the RGB color model. 
Answer : RGB color model
[A]: The RGB color space is based upon what?


[Q]: Context : Prince Caspian (originally published as Prince Caspian: The Return to Narnia) is a high fantasy novel for children by C. S. Lewis, published by Geoffrey Bles in 1951. 
Answer : Narnia
[A]: Which place does Prince Caspian exist in?


[Q]: Context : CMT Top 12 Countdown was a music video show that aired on Country Music Television (CMT) that debuted in 1994 and ended in December 2001 in favor for the longer Top 20 Countdown. 
Answer : Country Music Television
[A]:
Which network is CMT Top 12 Countdown available on?