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