Task: Question Generation
Input (English): Context : The Type 90 Ship-to-Ship Missile (90式艦対艦誘導弾, SSM-1B) is a ship-launched anti-ship missile developed by Japan's Mitsubishi Heavy Industries that entered service in 1992. 
Answer : 1992
Output (English): What year was the service entry date for Type 90 Ship-to-Ship Missile?