{HEAD ~ Various embodiments} of the present invention help to eliminate {TAIL ~ the necessity} for copies of data as discussed previously 
help to eliminate
{ HEAD ~ Various embodiments } of the present invention help to eliminate { TAIL ~ the necessity } for copies of data as discussed previously
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH