instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
Context : The Battle of Vescera (modern Biskra in Algeria) was fought in 682 or 683 between the Berbers of king Caecilius and their Byzantine allies from the Exarchate of Carthage against an Umayyad Arab army under Uqba ibn Nafi (the founder of Kairouan).
Question : The point in time of Battle of Vescera was when?
answer:
682

question:
Context : John Nelson Shanks (December 23, 1937 -- August 28, 2015) was an American artist and painter.
Question : What was Nelson Shanks's career?
answer:
painter

question:
Context : The RPG-40 was an anti-tank hand grenade developed by the Soviet Union in 1940.
Question : What year was the service entry date for RPG-40?
answer:
1940