Definition: 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.
Input: Context : The Samozaryadnaya Vintovka Tokareva, Obrazets 1940 goda (''Tokarev Self-loading Rifle, Model of 1940'', Russian: , 1940 ) or SVT-40 is a Soviet semi-automatic battle rifle.
Answer : 1940
Output:
What year did SVT-40 come into use?