When the lid is in the third position substantially all of {HEAD ~ the top opening} of {TAIL ~ the container} is uncovered 
of
When the lid is in the third position substantially all of { HEAD ~ the top opening } of { TAIL ~ the container } is uncovered
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH