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