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 was the first person to sing amarillo by morning?" whose answer is Terry Stafford.
Each document should contain about 30 words, and these documents should contain useful information.

Query: first singer of Amarillo by Morning
Useful Output:

Doc 1: "Amarillo by Morning" was written by Terry Stafford and Paul Fraser and George Strait's cover of it propelled him to stardom.
Doc 2: The Story Behind the Song: ”Amarillo by Morning” (written by Paul Fraser and Terry Stafford) Terry Stafford (#31, 1974) George Strait (#4, 1983)
Doc 3: Terry Stafford supposedly wrote the song one night after performing at a rodeo in San Antonio. It's easy to understand how this served as the inspiration.
Doc 4: "Amarillo By Morning" was originally recorded by Terry Stafford. He co-wrote the song with Paul Fraser and released it in 1973.
Doc 5: Her name was Melba Montgomery, with whom Jones had logged a top five single in 1963 called “We Must Have Been Out of Our Minds.” George always