{HEAD ~ The choice} of material will depend on a variety of factors such as the physical and chemical properties of {TAIL ~ the material} being employed 
{ HEAD ~ The choice } of material will depend on a variety of factors such as the physical and chemical properties of { TAIL ~ the material } being employed
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH