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 originally sang deep in the heart of texas?" whose answer is Perry Como.
Each document should contain about 30 words, and these documents should contain useful information.

Query: original singer of "Deep in the Heart of Texas"
Useful Output:

Doc 1: “Deep in the Heart of Texas” made it into the movies that year too. In March, Tioga's own Gene Autry sang it on screen in Heart of the Rio
Doc 2: Provided to YouTube by Believe SAS Deep in the Heart of Texas  Johnny Tillotson "Ten songs for you" GR 059/18 (Full Album). Grecords1960
Doc 3: Deep In The Heart Of Texas "Deep in the Heart of Texas" is an  Texas. The 1941 song features lyrics by June Hershey and music by Don Swander.
Doc 4: CD audio, original 78rpm issue on Decca 4138 - Deep In The Heart Of Texas (Don Swander-June Hershey) by Ted Weems & his Orchestra, vocal by
Doc 5: Deep in the heart of Texas is goodness. Good, God fearing people that desire to hurt right alongside their neighbor.