They are playing ice-hockey.
Ze spelen ijshockey.
Canadians enjoy their national sport.
Canadezen genieten van hun nationale sport.
Just because they are playing ice-hockey, you can't assume they are Canadians or that ice-hockey is their national sport.  Someone playing ice-hockey could Americans.
Gewoon omdat ze ijshockey spelen, kun je niet aannemen dat ze Canadezen zijn of dat ijshockey hun nationale sport is.