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: "when did notre dame first wear green jerseys?" whose answer is 1977.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Notre Dame first green jersey
Useful Output:

Doc 1: The exact debut for Notre Dame in green jerseys is unknown, but the Irish started wearing them on occasion in the 1920s.
Doc 2: The first known green jersey game was against Iowa on Oct. 8, 1921. The Irish lost 10-7. Rockne, however, would use the green jerseys again on
Doc 3: Notre Dame historians have long claimed that it was a game against the Hawkeyes in 1921 when Rockne first pulled green shirts off the rack.
Doc 4: Early Days: 1921-40. It is uncertain when Notre Dame first used green jerseys. A lot of people will tell you it happened against the Iowa
Doc 5: Some say Notre Dame first wore them over 100 years ago, when it was defeated by Iowa in 1921 (the school's official history of the green jersey