means for setting {TAIL ~ an execution sequence} of said knowledge sheets in {HEAD ~ the scenario} with references to the scenario; and 
means for setting { TAIL ~ an execution sequence } of said knowledge sheets in { HEAD ~ the scenario } with references to the scenario ; and
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH