Here's a short story:

As the governing body of association football, FIFA is responsible for maintaining and implementing the rules that determine whether an association football player is eligible to represent a particular country in officially recognised international competitions and friendly matches. In the 20th century, FIFA allowed a player to represent any national team, as long as the player held citizenship of that country. In 2004, in reaction to the growing trend towards naturalisation of foreign players in some countries, FIFA implemented a significant new ruling that requires a player to demonstrate a "clear connection" to any country they wish to represent. FIFA has used its authority to overturn results of competitive international matches that feature ineligible players. 

FIFA's eligibility rules also demand that in men's competitions, only men are eligible to play, and that in women's competitions, only women are eligible to play. 

Historically, it was possible for players to play for different national teams. For example, Alfredo di Stefano played for Argentina (1947) and Spain (1957–61). 

Di Stefano's Real Madrid teammate Ferenc Puskás also played for Spain after amassing 85 caps for Hungary earlier in his career. A third high-profile instance of a player switching international football nationalities is Jose Altafini, who played for Brazil in the 1958 FIFA World Cup and for Italy in the subsequent 1962 FIFA World Cup. (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: What is FIFA
Guess: governing body
Confidence: <appropriate level of confidence in this guess>

Question: of what?
Guess: association football
Confidence: <appropriate level of confidence in this guess>

Question: What do Americans call this sport?
Guess: soccer
Confidence: <appropriate level of confidence in this guess>

Question: What is one thing they do?
Guess: maintaining and implementing the rules
Confidence: <appropriate level of confidence in this guess>

Question: for what?
Guess: eligibility
Confidence: <appropriate level of confidence in this guess>

Question: How did they decide if a person could play for a national team before?
Guess: citizenship
Confidence: <appropriate level of confidence in this guess>

Question: When did this change?
Guess: In 2004
Confidence: <appropriate level of confidence in this guess>

Question: Why?
Guess: in reaction to the growing trend
Confidence: <appropriate level of confidence in this guess>

Question: How do they decide now?
Guess: clear connection
Confidence: <appropriate level of confidence in this guess>

Question: What do they do if a match has someone that should not be playing?
Guess: overturn results
Confidence: <appropriate level of confidence in this guess>

Question: Has anyone ever played for more than one national team?
Guess: yes
Confidence: <appropriate level of confidence in this guess>

Question: Who was one such person?
Guess: Alfredo di Stefano
Confidence: <appropriate level of confidence in this guess>

Question: Who did he play for?
Guess: Argentina and Spain
Confidence: <appropriate level of confidence in this guess>

Question: What else does FIFA say about men's competitions?
Guess: only men are eligible
Confidence: <appropriate level of confidence in this guess>

Question: What professional team does Puskas play for?
Guess: Real Madrid
Confidence: <appropriate level of confidence in this guess>

Question: And he has played for what countries?
Guess: Spain and Hungary
Confidence: <appropriate level of confidence in this guess>

Question: Did Altafine play in more than one World Cup?
Guess: yes
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: when?

1958 and 1962