Assertion: art movement's work | /r/HasProperty | derived
Facets:
value: often
type: DEGREE
value: from existing works
type: OTHER
Source sentences:
text: Once the movement has spread to the United States, artists like Andy Warhol and Roy Lichtenstein would contribute to this found art movement, producing works that were often wholly derived from existing works, or which were painted representations of photographs depicted elements of mass media.