{HEAD ~ A part} of the bag or the entire bag may be disposed on {TAIL ~ a seat pan} 
disposed on
{ HEAD ~ A part } of the bag or the entire bag may be disposed on { TAIL ~ a seat pan }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL