{HEAD ~ The present invention} provides {TAIL ~ a new and improved insulation system} for the roof of a building 
provides
{ HEAD ~ The present invention } provides { TAIL ~ a new and improved insulation system } for the roof of a building
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH