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 sings i should have been a cowboy?" whose answer is Toby Keith.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who sings i should have been a cowboy
Useful Output:

Doc 1:  music industry, and the story behind how he wrote his breakout single, “Should've Been a Cowboy” on The Big Interview! Watch the full
Doc 2: Toby Keith - Should've Been A Cowboy (Lyrics) Should've Been A Cowboy by Toby Keith lyric video If you love this video don't forget to Like
Doc 3: Toby Keith "I Should Have Been a Cowboy" (Dallas Cowboys Version) · Comments.
Doc 4: Toby Keith scored his first No. 1 hit with his debut single, 1993's "Should've Been a Cowboy." When he was inspired to write the song after
Doc 5: Toby Keith - Should've Been a Cowboy (1993) I bet you've never heard ol' Marshal Dillon say Miss Kitty, have you ever thought of runnin'