... slots in input frames; 4. The history of processing, structured Mong the lines of the episodic memory oWaa~zat~on suggested by Kolodner (1984) and including the feedback of the results of ... items, therefore, comes as a result of the use of the various control heuristics that guide the process of generation. In other words, they axe incorpo- rated in the procedural knowledge rather ... representation of both the proposi- tional and the non-propositional meaning of the input text. The task of a natural language generator is, in some sense, the opposite task of rendering an unambiguous...