In a typical guitar tab for Metallica's "Enter Sandman," the first note of the introductory riff is position 0 (open) on the E string, the second note is position 7 on the A string, and the third note is in which position (we want a number) on the D string?
(If it helps, the note you're playing is a minor third above the root of the key the song is in.)
5