Question: Who assumed vocal duties on the twelfth studio album by Black Sabbath?
Sentence (from "Heaven &amp; Hell Tour"): The tour marked the band's first live shows with vocalist Ronnie James Dio, who replaced original vocalist Ozzy Osbourne the previous year; drummer Vinny Appice, who replaced original drummer Bill Ward in the middle of the tour's North American leg after Ward suddenly left the band due to personal issues; and keyboardist Geoff Nicholls, who played keyboards on the "Heaven and Hell" album and accompanied the band on this tour as a sideman.
Relevant evidence: No