Assertion: collagen's type | /r/AtLocation | this arrangement
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Not all types of collagen are formed into fibers, made up of fibrils (which are themselves made of groups of triplets of individual collagen molecules), but three of the five major types of collagen – labeled I, II, III, IV and V – are often seen in this arrangement.