Task: Question Understanding
Input (English): Context : The BRDM-2 (Boyevaya Razvedyvatelnaya Dozornaya Mashina, Боевая Разведывательная Дозорная Машина, literally ``Combat Reconnaissance/Patrol Vehicle'') is an amphibious armoured patrol car used by Russia and the former Soviet Union. 
Question : What was the year BRDM-2 entered service?
Output (English): service entry