{HEAD ~ This invention} relates to {TAIL ~ floor} covering installation equipment and to methods of installing floor covering 
relates to
{ HEAD ~ This invention } relates to { TAIL ~ floor } covering installation equipment and to methods of installing floor covering
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH