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gptkb:2000-2010_NBA
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Implementation of the instant replay system
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gptkb:XFL_(2001)
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No fair catches
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gptkb:XFL_2001
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Overtime rules introduced
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gptkb:XFL_2001
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Double forward pass allowed
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gptkb:XFL_2001
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No extra point kicks allowed
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gptkb:XFL_(2001)
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Extra point options
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gptkb:2000-2010_NBA
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Introduction of the zone defense
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gptkb:31st_Hunger_Games
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Previous victors are forced to compete
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gptkb:XFL_2001
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No fair catches allowed
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gptkb:XFL_2001
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Skycam used for broadcasts
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gptkb:2000-2010_NBA
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Changes to hand-checking rules
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gptkb:XFL_(2001)
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Two forward passes allowed
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