code for designating {HEAD ~ the second set} of {TAIL ~ candidates} as the plurality of information extractors 
of
code for designating { HEAD ~ the second set } of { TAIL ~ candidates } as the plurality of information extractors
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH