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 has the best winning percentage in nfl history?" whose answer is Dallas Cowboys.
Each document should contain about 30 words, and these documents should contain useful information.

Query: best winning percentage in nfl history
Useful Output:

Doc 1: The Cowboys and Ravens are tied for the best winning percentage at .574. The 49ers have won the most playoff games in NFL history with 39.
Doc 2: First on the list is Guy Chamberlin, who dominated football with a .783 win percentage during the 1922-27 seasons. Chamberlin was 28 years old
Doc 3: Baltimore Ravens - .5738%  As mentioned the Ravens now own the crown of NFL's winningest team in terms of winning percentage with .5738%.
Doc 4: Jalen Hurts has the 6th best QB winning percentage (.708, 46-19) since the 1970 NFL merger. Here is the list. ￼ Patrick Mahomes (791, 87-23)
Doc 5: Ravens Claim Best Winning Percentage In NFL History · 1) Ravens .5738% · 2) Cowboys .5736% · 3) Packers .5728% · 4) Chiefs .5536% · 5) Dolphins