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