The lift moves {HEAD ~ the platform structure} among {TAIL ~ an entry level position} which is at the vehicle door opening, a stowed position which is inside the vehicle, and a ground level position which is outside the vehicle 
among
The lift moves { HEAD ~ the platform structure } among { TAIL ~ an entry level position } which is at the vehicle door opening , a stowed position which is inside the vehicle , and a ground level position which is outside the vehicle
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH