You didn't ask, but I'll just add that an unconscious person in the end stage of a terminal disease will not experience any discomfort from the lack of food or water. Indeed, dehydration and hypoglycemia release natural endorphins that reduce sensations of pain or hunger.
The music to Somewhere over the Rainbow was written by Harold Arlen; the lyrics were written by Edgar Yipsel (Yip) Harburg. But Julie Garden sang it. Arlen and Harburg collaborated on all the songs featured in the movie, The Wizard of Oz. Over the Rainbow won Academy awards for them both.
The song is number one on the Songs of the Century list compiled by the Recording Industry Association of America and the National Endowment for the Arts. The American Film Institute also ranked Over the Rainbow the greatest movie song of all time on the list of AFI's 100 Years...100 Songs.