In FIG 4, the doors are shown open at the bottom and closed at {TAIL ~ the top} of {HEAD ~ the figure} 
In FIG 4 , the doors are shown open at the bottom and closed at { TAIL ~ the top } of { HEAD ~ the figure }
OTH OTH OTH 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