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.

Ex Input:
Context : Trace of Stones (German: Spur der Steine) is a 1966 East German film by Frank Beyer. 
Answer : Spur der Steine

Ex Output:
The Trace of Stones is based upon what?


Ex Input:
Context : Catch the Lightning is a novel by Catherine Asaro in the Saga of the Skolian Empire, also known as Tales of the Ruby Dynasty. 
Answer : Saga of the Skolian Empire

Ex Output:
To which series does Catch the Lightning belong?


Ex Input:
Context : Andrés Barba (born Madrid, 1975) is a Spanish writer. 
Answer : writer

Ex Output:

What kind of  occupation does Andrés Barba have?