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