Furthermore, {HEAD ~ the stabilizing effects} of the covering make {TAIL ~ the mattress} stationary for surgical operations 
make
Furthermore , { HEAD ~ the stabilizing effects } of the covering make { TAIL ~ the mattress } stationary for surgical operations
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH