You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who is the oldest player to have played in a world cup?" whose answer is Essam El-Hadary.
Each document should contain about 30 words, and these documents should contain useful information.

Query: oldest player to have played in a World Cup
Useful Output:

Doc 1: Goalkeeper Essam El-Hadary became the oldest player in a World Cup history, as well as the oldest to make their debut.
Doc 2: Roger Milla became the oldest player to score a World Cup goal in June 1994, when his Cameroon side faced Russia in the United States.
Doc 3: Who will be the oldest players at World Cup 2022? Ronaldo (37) and Messi (35) are two of the oldest players at Qatar 2022, but they are the only
Doc 4: Ronaldo (37) and Messi (35) are two of the oldest players at Qatar 2022, but they are the only elder statesmen looking to make an impact in the
Doc 5: Egypt goalkeeper Essam El-Hadary is the oldest footballer to play in the men's FIFA World Cup. He played in the Russia 2018 football World