Assertion: pvc | /r/AtLocation | some regions of the world pvc
Facets:
value: from oil
type: OTHER
value: from salt
type: OTHER
value: most frequently
type: DEGREE
Source sentences:
text: Whilst PVC is most frequently made from salt and oil, in some regions of the world PVC is made without using oil feedstock at all (substituting oil-derived hydrocarbon with bio-derived hydrocarbon feedstock).