Question: Are both Ontronik Khachaturian and Siouxsie Sioux singers and producers?
Sentence (from "Siouxsie Sioux"): She is best known as the lead singer of the alternative rock band Siouxsie and the Banshees (1976–1996) and the drums-and-voice duo the Creatures (1981–2005).
Relevant evidence: No