Question: What is the date of death of the performer of song Let'S Think About Living?
Sentence (from "Let's Think About Living"): The song is an open critique of the teenage tragedy song and gunfighter ballad genera of the time, humorously quipping that if Marty Robbins, Patti Page and the Everly Brothers actually died in the songs where they mention dying ("El Paso" and "Cathy's Clown" in the first and last respective cases) that the singer will soon be the last surviving musician in the industry.
Relevant evidence: No