Question: When did the performer of song Perdoname (Demis Roussos Song) die?
Sentence (from "Demis Roussos"): Artemios "Demis" Ventouris-Roussos (15 June 1946 – 25 January 2015) was a Greek vocalist and performer who had an internationally acclaimed career, as a single recording artist and bandleader.
Relevant evidence: Yes