Question: Who sang the song "Big Four Poster Bed" written by Sheldon Allan Silverstein, an American poet and singer songwriter? 
Sentence (from "Shel Silverstein"): Sheldon Allan "Shel" Silverstein ( ; September 25, 1930 – May 10, 1999) was an American poet, singer-songwriter, cartoonist, screenwriter, and author of children's books.
Relevant evidence: Yes