Conversation so far:
what was a song on the album consign to oblivion/the score by epica?
"A New Age Dawns.
who was a singer on one of these albums?
The album features guest singing by Roy Khan .
were there any other singers?
CANNOTANSWER.

Question: when was one of the albums released?
Self-contained rewrite: when was the Epica album Consign To Oblivion/The Score released?