Question: What opera that Gerd Grochowski performed in was the last of four music dramas?
Sentence (from "Gerd Grochowski"): Gerd Grochowski (28 February 28, 1956, Krefeld – 16 January 2017, Mainz) was a German operatic bass-baritone who had an active international career from 1986 until his death in 2017.
Relevant evidence: Yes