# $_ =~ s/(\[.*\]) 
                             #match within first [ 
                             #charachters inside it ]
          #        \s+         
                             #match a space after this
          #        (\[.*\]).*  
                             #match again for the second [ 
                             #charachters inside it ]
          #        (SNMP: Get$)/; 
                             #match the SNMP part of
                             # the string 
          #        print "$1 $2 $3\n";