The candles may be made from pure triacylglycerol or may include minor amounts of {HEAD ~ other additives} to modify {TAIL ~ the properties} of the waxy material 
to modify
The candles may be made from pure triacylglycerol or may include minor amounts of { HEAD ~ other additives } to modify { TAIL ~ the properties } of the waxy material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH