TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Once a Cop (Chinese: ) is a 1993 Hong Kong action film directed by Stanley Tong and starring Michelle Yeoh.
Question : Who is the director of the film, Once a Cop?

SOLUTION: Stanley Tong

PROBLEM: Context : The Sleepwalker Killing also known as From the Files of Unsolved Mysteries:
Question : Which is the basis of The Sleepwalker Killing?

SOLUTION: Unsolved Mysteries

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.
Question : Over what river does Megyeri Bridge cross?

SOLUTION:
Danube