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 came up with the song amazing grace?" whose answer is John Newton.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "Amazing Grace" original writer
Useful Output:

Doc 1: "Amazing Grace: The Story of America's Most Beloved Song" by Steve Turner (Ecco), in Trade Paperback and eBook formats, available via Amazon
Doc 2: A look at the story behind John Newton's hymn Amazing Grace and a review of some of its modern-day interpretations.
Doc 3: A popular myth surrounds the hymn “Amazing Grace.” The story goes something like this: John Newton was a wretched slave trader,
Doc 4: "Amazing Grace" - The Story Behind The Music - The Life Of Minister John Newton · Comments290.
Doc 5: Amazing Grace was written by an Englishman who in the early part of his life was an outspoken atheist, libertine, and slave trader.