Given the task definition and input, reply with output. In this task, a passage will be given and the goal is to generate a question about temporal relations based on that passage. A temporal relation describes the relation between two things with respect to time e.g., something happens/starts/terminates/... immediately/shortly/usually/... before/after/during/... something else.
Your question should include an event, or ask about an event, and should not be a yes/no question.

Passage: Together with its derivatives, the Kalashnikov rifle has been used by the police and armies of 55 countries and an assortment of guerrillas, terrorists and just plain thugs around the globe. Seventy-five million copies of the rifle have been built since it entered production in February 1947, making it history's most widely distributed weapon.
What event has already finished?