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 is the parent company of dunkin donuts?

SOLUTION: Who was the parent company of Dunkin Donuts in 1990?

PROBLEM: Who sings the theme song of doc mcstuffins?

SOLUTION: Who sings the theme song of doc mcstuffins seasons 1-3?

PROBLEM: What is the new tallest building in san francisco?

SOLUTION:
What is the new tallest building in san francisco in 1972?