{TAIL ~ A system} 2, wherein {HEAD ~ the one or more directives} comprise an inbound and an outbound directive 
{ TAIL ~ A system } 2 , wherein { HEAD ~ the one or more directives } comprise an inbound and an outbound directive
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH