Question: What is the meaning of yellow card in fifa?

Disambiguated questions and answers:
context: The idea of using language-neutral coloured cards to communicate a referee's intentions originated in association football, with English referee Ken Aston. Aston had been appointed to the FIFA Referees' Committee and was responsible for all referees at the 1966 FIFA World Cup. In the quarter-finals, England met Argentina at the Wembley Stadium. After the match, newspaper reports stated that referee Rudolf Kreitlein had cautioned Englishmen Bobby and Jack Charlton, as well as sending off Argentinian Antonio Rattín. The referee had not made his decision clear during the game, and England manager Alf Ramsey approached FIFA representative for post-match clarification. This incident started Aston thinking about ways to make a referee's decisions clearer to both players and spectators. Aston realised that a colour-coding scheme based on the same principle as used on traffic lights (yellow – stop if safe to do so, red – stop) would transcend language barriers and make it clear that a player had been cautioned or expelled. As a result, yellow cards to indicate a caution and red cards to indicate an expulsion were used for the first time in the 1970 FIFA World Cup in Mexico. The use of penalty cards has since been adopted and expanded by several sporting codes, with each sport adapting the idea to its specific set of rules or laws.
question: What does a yellow card represent in FIFA soccer?
short_answers: booking
caution
player has been officially cautioned
wikipage: Penalty card
context: No context provided
question: What is the meaning of a yellow card in FIFA soccer in terms of a player's eligibility?
short_answers: may continue playing
context: No context provided
question: What is the meaning of a yellow card in FIFA soccer if a player has already been shown a yellow card?
short_answers: sent off
player must be sent off

Long-form answers:
knowledge: content: A yellow card is shown by the referee to indicate that a player has been officially cautioned.[2] The player's details are then recorded by the referee in a small notebook; hence a caution is also known as a "booking". A player who has been cautioned may continue playing in the game; however, a player who receives a second caution in a match is sent off (shown the yellow card again, and then a red card), meaning that they must leave the field immediately and take no further part in the game. The player may not be replaced by a substitute. Law 12 of the Laws of the Game (which are set by the International Football Association Board and used by FIFA) lists the types of offences and misconduct that may result in a caution or is cautionary.
wikipage: Penalty card Yellow card
long_answer: A yellow card in FIFA is shown by the referee to indicate that a player has been officially cautioned. The player's details are then recorded by the referee in a small notebook. A player who has been cautioned may continue playing in the game; however, a player who receives a second caution in a match is sent off. This player is shown the yellow card again and then is shown a red card, meaning that they must leave the field immediately and take no further part in the game. Additionally, the player may not be replaced by a substitute. Law 12 of the Laws of the Game, which are set by the International Football Association Board and used by FIFA, lists the types of offences and misconduct that may result in a yellow card.