TASK DEFINITION: In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.
PROBLEM: When did o canada become canada's national anthem?

SOLUTION: When was o canada first used as canada's national anthem?|When did "O Canada" become Canada's de facto national anthem? 
 1939

PROBLEM: What is formed on top of continental crust?

SOLUTION: What is formed on top of the continental crust known as continental shelves? 
 ocean waters

PROBLEM: Who makes the rules for house and senate?

SOLUTION:
Who makes the rules for U.S. house? 
 United States House of Representatives