Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

[EX Q]: Context : Earplay was the longest-running of the formal series of radio drama anthologies on National Public Radio, produced by WHA in Madison, Wisconsin and heard from 1972 into the 1990s. 
Answer : WHA
[EX A]: What was the original network of Earplay?

[EX Q]: Context : The Portrait of Bernhart von Reesen is a painting by German Renaissance master Albrecht Dürer, dating from 1521, now housed in the Gemäldegalerie Alte Meister of Dresden, Germany. 
Answer : Gemäldegalerie Alte Meister
[EX A]: What is the name of the place where Portrait of Bernhart von Reesen can be found?

[EX Q]: Context : In cryptography, DES-X (or DESX) is a variant on the DES (Data Encryption Standard) symmetric-key block cipher intended to increase the complexity of a brute force attack using a technique called key whitening. 
Answer : Data Encryption Standard
[EX A]:
Which is the basis of DES-X?