The seat, arm rests, foot rest and back rest form {TAIL ~ a chair} for {HEAD ~ the user} 
The seat , arm rests , foot rest and back rest form { TAIL ~ a chair } for { HEAD ~ the user }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD