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 wrote mamas dont let your babies grow up to be cowboys?" whose answer is Ed Bruce.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who wrote mama don't let your babies grow up to be cowboys
Useful Output:

Doc 1: The Unbroken Circle: Waylon Jennings and Willie Nelson – “Mammas Don't Let Your Babies Grow Up to Be Cowboys” (1978)  Mamas, let your babies
Doc 2: Online Store NOW OPEN! https://countrysfamilyreunion.myshopify.com/ STREAM MUSIC HERE! https://lnk.to/CfrListenNow To read exclusive stories
Doc 3: Ed Bruce - Remembering a Legend - The Writer of "Mammas Don't Let Your Babies Grow Up To Be Cowboys" · Comments16.
Doc 4: Lukas Nelson and Shooter Jennings cut “Mammas Don't Let Your Babies Grow Up to Be Cowboys” as the theme song to the Netflix series The Ranch.
Doc 5: Love Willie Nelson. He has a great voice, love his guitar playing, and his cover songs sounds diffrent and often better than the original.