selecting templates of {HEAD ~ a biometric corpus} as {TAIL ~ one or more speaker identity candidates} for a probe based on the prototypes 
as
selecting templates of { HEAD ~ a biometric corpus } as { TAIL ~ one or more speaker identity candidates } for a probe based on the prototypes
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH