Task: Question Generation
Input (English): Context : The Rk 62 (also 7.62 RK 62 and M62; Rynnäkkökivääri 62 or ``assault rifle 62'') is an assault rifle manufactured by Valmet and Sako. 
Subject : Rk 62 
Relation : service entry
Output (English): What was the year Rk 62 entered service?