Question: WHo is a Grammy winning American musician of Armenian descent, Armen Nalbandian or Arto Tunçboyacıyan?
Sentence (from "Arto Tunçboyacıyan"): Arto Tunçboyacıyan (Armenian: Արտո Թունջբոյաջյան ) (born 4 August 1957 in Istanbul) is a Grammy winning American musician of Armenian descent.
Relevant evidence: Yes