{HEAD ~ The cooking grill} is of {TAIL ~ relatively lightweight and rugged construction} and can be economically manufactured from the standard metal stock materials 
is of
{ HEAD ~ The cooking grill } is of { TAIL ~ relatively lightweight and rugged construction } and can be economically manufactured from the standard metal stock materials
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH