{HEAD ~ The wheelchair} also has {TAIL ~ improved stability} since the front ground engaging wheel also acts as a resiliently biased anti tip wheel 
has
{ HEAD ~ The wheelchair } also has { TAIL ~ improved stability } since the front ground engaging wheel also acts as a resiliently biased anti tip wheel
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH