{HEAD ~ The preservatives} contain {TAIL ~ Diphenylamine}, Ethoxyquin, Alkali earth silicates and a combustible wax 
contain
{ HEAD ~ The preservatives } contain { TAIL ~ Diphenylamine } , Ethoxyquin , Alkali earth silicates and a combustible wax
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH