The child or {HEAD ~ infants head} can simply rest against {TAIL ~ the car seat} 16 in this arrangement 
The child or { HEAD ~ infants head } can simply rest against { TAIL ~ the car seat } 16 in this arrangement
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH