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 were the first european to reach the americas and when did they arrive?

SOLUTION: Who were the first Europeans to reach the Americas?

PROBLEM: Who came up with the saying the customer is always right?

SOLUTION: Who from London came up with the saying the customer is always right?

PROBLEM: Who were the two superpowers during the cold war space race?

SOLUTION:
Who was the superpower in North America during the cold war space race?