It is {HEAD ~ an object} of {TAIL ~ the present invention} to provide a more cost effective, efficient energy absorber 
of
It is { HEAD ~ an object } of { TAIL ~ the present invention } to provide a more cost effective , efficient energy absorber
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH