Assertion: heavy metal | /r/DefinedAs | song structures
Facets:
value: loosely
type: MANNER
Source sentences:
text: Avant-garde metal (also known as avant-metal and 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.