A medical technique comprises {HEAD ~ the steps} of attaching a hammock to the head rail and foot rail of a crib, and placing {TAIL ~ a child} in the hammock 
A medical technique comprises { HEAD ~ the steps } of attaching a hammock to the head rail and foot rail of a crib , and placing { TAIL ~ a child } in the hammock
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH