Question: Both Dødheimsgard and Avant-garde metal are both examples of what?
Sentence (from "Avant-garde metal"): Avant-garde metal, also known as avant-metal or experimental metal, is a subgenre of heavy metal music loosely defined by use of experimentation and innovative, avant-garde elements, including non-standard and unconventional sounds, instruments, song structures, playing styles, and vocal techniques.
Relevant evidence: Yes