{HEAD ~ An input device} allows {TAIL ~ the viewer} to browse through the schedule information area and obtain more information about programs of particular interest 
allows
{ HEAD ~ An input device } allows { TAIL ~ the viewer } to browse through the schedule information area and obtain more information about programs of particular interest
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH