Task: Explanation
Input (English): MS-74 (№74 Factory's Modernised" Sniper rifle ") was a limited edition Soviet sniper rifle, made by Yevgeny Dragunov in 1949 at Izhevsk Machinebuilding Plant. The weapon was based on Mosin's rifle with 7.62×54mmR cartridge. The main aim was to increase accuracy and improve the comfort. It was tested and recommended for use. Question: The MS-74 was based on a military rifle whose inception was in what year? Answer: 1891
Output (English):  The weapon was based on Mosins rifle with 7.62×54mmR cartridge.