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.

Context : The Pont Alexandre III is a deck arch bridge that spans the Seine in Paris. 
Answer : Seine
What does Pont Alexandre III cross over?

Context : The Bullet is Not for Firing is the fourth episode of the third series of the British comedy series Dad's Army that was originally transmitted on Thursday 2 October 1969. 
Answer : Dad's Army
What series is the episode The Bullet is Not for Firing part of?

Context : Lego Prince of Persia is a Lego theme based on the video game Prince of Persia: The Sands of Time and the film of the same name. 
Answer : Prince of Persia: The Sands of Time

Which is the basis of Lego Prince of Persia?