Question: Which rock band is the American musician Maynard James Keenan a vocalist for that won three Grammy Awards, performed worldwide tours, and produced albums topping the charts in several countries?
Sentence (from "Maynard James Keenan"): Maynard James Keenan (born James Herbert Keenan; April 17, 1964), often referred to by his initials MJK, is an American singer, songwriter, musician, record producer, actor, and winemaker.
Relevant evidence: No