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On the football field, each team must have 11 of its members in play. Players can be changed if time allows. That's a lot of people on one field. For more information look here: http
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Game play in Football consists of series of downs, individual plays of short duration, outside of which the ball is dead or not in play. Substitutions can be made between downs. During
http://answers.ask.com/Sports/Other/what_are_the_r...
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The tight confines of an indoor arena have led to some creative rules differences between arena football and its outdoor cousins. Some of these differences include:
http://www.life123.com/sports/football/football-ru...
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