TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: 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?

SOLUTION: 682

PROBLEM: Context : The Eighth Doctor Adventures (sometimes abbreviated as EDA or referred to as the EDAs) are a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint. 
Question : The Eighth Doctor Adventures is based upon what?

SOLUTION: Doctor Who

PROBLEM: Context : Nosferatu the Vampyre was co-produced by Werner Herzog Filmproduktion, French film company Gaumont and German public-service television station ZDF. 
Question : What studio produced Nosferatu the Vampyre?

SOLUTION:
Werner Herzog Filmproduktion