{HEAD ~ A biometric unit} of {TAIL ~ the BCU} has a store of biometric information of an authorized BCU user and compares received biometric information with the stored biometric information to determine if the user is an authorized BCU user 
of
{ HEAD ~ A biometric unit } of { TAIL ~ the BCU } has a store of biometric information of an authorized BCU user and compares received biometric information with the stored biometric information to determine if the user is an authorized BCU user
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH