response: Do you know about American football? It is referred to as football in the United States and Canada.
original_response: Do you know about American football? It is referred to as football in the united states and Canada
history: American football is so popular but i dont care for it much.
knowledge: American football, referred to as football in the United States and Canada, and also known as gridiron football or simply gridiron, is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end.