TASK DEFINITION: In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
PROBLEM: Who wrote the words to abide with me?

SOLUTION: Who wrote the words to abide with me in 1847?

PROBLEM: Who played dr zeus in planet of the apes?

SOLUTION: Who played Dr. Zaius in the 1968 film Planet of the Apes?

PROBLEM: Who built the first railroad in the united states?

SOLUTION:
Who built the first funicular railway in the united states?