{HEAD ~ input and local fields} that store {TAIL ~ knowledge variables} that operate said output knowledge variable; and 
store
{ HEAD ~ input and local fields } that store { TAIL ~ knowledge variables } that operate said output knowledge variable ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH