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