Does a football referee have the right to undo or cancel giving a yellow or red card to a player after doing that? Is there a special signal that explains that? -
Has a referee ever been sent off? | Soccer | The Guardian
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A step too far. Lauren James shown a red card in England's Women's World Cup win over Nigeria | AP News
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Yellow and red cards to increase after FA tells referees to get stricter
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What is yellow card in football? Know rules and history
Penalty card - Wikipedia
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Red & Yellow Cards (FIFA Styled) – REFSTORE
Referee hands out 15 yellow cards and two red cards in Barcelona's clash with Espanyol | Daily Mail Online
TIL red and yellow cards in FIFA were introduced after a referee was stopped at a traffic light and thought "Yellow, take it easy; red: stop, you're off". They also helped to
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