Simplify the following text for a Grade 7 native English-speaking person.
Original: The next year , Pearson put to the House of Commons a motion that `` the government be authorized to take such steps as may be necessary to provide that ' O Canada ' shall be the National Anthem of Canada while ` God Save the Queen ' shall be the Royal Anthem of Canada , '' of which parliament approved .
Simplified: O Canada is the national anthem of Canada .