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 : Zagi M-91 is a submachine gun created in 1991, when the dissolution of Yugoslavia left Croatia with few or no weapons to arm their military in the time of Croatian War of Independence.
Answer : 1991
Output:
What year was Zagi M-91 introduced?