Assertion: cartilage's matrix | /r/HasProperty | made up elastin
Facets:
value: of collagen fibers
type: OTHER
value: of glycosaminoglycans
type: OTHER
value: sometimes
type: TEMPORAL
value: of proteoglycans
type: OTHER
Source sentences:
text: The matrix of cartilage is made up of glycosaminoglycans, proteoglycans, collagen fibers and, sometimes, elastin.