Odpowiedź:
football
Football must be played on a football pitch
Football can't be played on a tennis court
Football should be played by two teams of 11 players
During the football match, there ought to be a referee
In professional matches, there have to be a break
In case of amateur football matches, players may take a break.
Football players shouldn't foul each other.
Sometimes the referee may order a play-off if both teams scored equal points in the previous game
