instruction:
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.
question:
Who did the voice of mumble in happy feet?
answer:
Who did the voice of baby Mumble in Happy Feet?


question:
Who were the first european to reach the americas and when did they arrive?
answer:
Who were the first Europeans to reach the Americas?


question:
Who voices the main character in the lego movie?
answer:

Who voices the main hero in The Lego Movie (2014)?