Question: What is the date of death of the performer of song Blame Canada?
Sentence (from "Blame Canada"): In the song, the parents of the fictional "South Park", led by Sheila Broflovski (Mary Kay Bergman), decided to blame Canada for the trouble their children have been getting into since watching the Canadian-made movie "Terrance and Phillip: Asses of Fire" and imitating what they saw and heard in the movie. "
Relevant evidence: Yes