Each of the interface elements 330 1 330 3 corresponds to {HEAD ~ an interaction} with {TAIL ~ Candidate} 2 
Each of the interface elements 330 1 330 3 corresponds to { HEAD ~ an interaction } with { TAIL ~ Candidate } 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH