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 was chris tate's wife in emmerdale farm?

SOLUTION: Who was chris tate's wife in emmerdale farm during 1991-1994?

PROBLEM: When did the old age pension start in australia?

SOLUTION: When did an old age pension start in parts of australia?

PROBLEM: Who plays kate pearson's mom on this is us?

SOLUTION:
Who plays adult kate pearson's mom on this is us?