Detailed Instructions: 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.
Problem:Context : The Megyeri Bridge, previously known as the Northern M0 Danube bridge, is a cable-stayed bridge that spans the River Danube between Buda and Pest, respectively the west and east sides of Budapest, the capital of Hungary.
Answer : Danube
Solution:
Over what river does Megyeri Bridge cross?