Definition: 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.
Input: Context : Prinzessin Brambilla (Princess Brambilla), Op. 12b is an opera in a prologue and five scenes by Walter Braunfels.
Answer : Princess Brambilla
Output:
The Prinzessin Brambilla is based upon what?