The present invention has reduced or eliminated {HEAD ~ the problems} associated with {TAIL ~ the prior art} previously described 
associated with
The present invention has reduced or eliminated { HEAD ~ the problems } associated with { TAIL ~ the prior art } previously described
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH