performing {HEAD ~ a voice matching operation} between the speaker identity candidates and {TAIL ~ the templates} in the biometric corpus to obtain speaker identity candidate match scores 
between
performing { HEAD ~ a voice matching operation } between the speaker identity candidates and { TAIL ~ the templates } in the biometric corpus to obtain speaker identity candidate match scores
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH