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