Q: 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.
Context : The Type 90 Ship-to-Ship Missile (90, SSM-1B) is a ship-launched anti-ship missile developed by Japan's Mitsubishi Heavy Industries that entered service in 1992.
Answer : 1992
A:
What year was the service entry date for Type 90 Ship-to-Ship Missile?