means for receiving a scenario for specifying {HEAD ~ an execution sequence} of {TAIL ~ knowledge sheets}; and 
means for receiving a scenario for specifying { HEAD ~ an execution sequence } of { TAIL ~ knowledge sheets } ; and
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH