In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

[Q]: Context: the Khan of Khiva and the Emir of Bukhara Link Information: none Answer: none
[A]: Which place has the highest recorded population, the place where the Khan came from or the place where the Emir came from?


[Q]: Context: After leaving the Academy, German continued to teach at Wimbledon School and to play the violin in orchestras at various London theatres, including the Savoy. Link Information: none Answer: none
[A]: How many times did Edward German play at the Savoy?


[Q]: Context: The world-premiere cast included Thomas Hampson as Valmont, Frederica von Stade as Merteuil, David Hobson as Chevalier de Danceny, Renée Fleming as Tourvel and Mary Mills as Cécile de Volanges. Link Information: Thomas Walter Hampson (born June 28, 1955) Answer: Frederica von Stade
[A]:
Which of the notable casts from the world-premiere was the oldest?