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 : Trace of Stones (German: Spur der Steine) is a 1966 East German film by Frank Beyer. 
Answer : Spur der Steine
[A]: The Trace of Stones is based upon what?


[Q]: Context : Mark van Platen (born 1955) is a Dutch composer, conductor, organist and pianist. 
Answer : composer
[A]: What was Mark van Platen's career?


[Q]: Context : Eugen Coca (15 April 1893 -- 9 January 1954) was a Moldovan composer and violinist. 
Answer : composer
[A]:
What was Eugen Coca's career?