{HEAD ~ The system} of the present invention constitutes {TAIL ~ an improvement} in the implementation of what is described in the referenced Parent Case as a less preferred practice or embodiment 
constitutes
{ HEAD ~ The system } of the present invention constitutes { TAIL ~ an improvement } in the implementation of what is described in the referenced Parent Case as a less preferred practice or embodiment
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH