for displaying {HEAD ~ the child frame} at {TAIL ~ an appropriate displayed position} using the data for display 
at
for displaying { HEAD ~ the child frame } at { TAIL ~ an appropriate displayed position } using the data for display
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH