What came first, the release of the Greatest Hits, Etc. or the formation of Simon & Garfunkel?
Greatest Hits, Etc.: Greatest Hits, Etc. is the first greatest hits compilation album by American singer-songwriter Paul Simon, released in November 1977 by Columbia Records. Paul Simon:  Simon's musical career has spanned seven decades, with his fame and commercial success beginning as half of the duo Simon & Garfunkel, which was formed in 1964 with Art Garfunkel.
Simon & Garfunkel