American football - Wikipedia
https://en.wikipedia.org/wiki/American_football
American football, also referred to simply as football in the United States and Canada, and also known as gridiron, is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense, the team with possession of the oval-shaped football, attempts to advance down the field by running with the ball or passing it, while the defense, …
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