ing general factors in events and objects (abstraction), but excluding pecurialities to each of them (subtraction). In our model, a node represents a concept, and an arc represents a relation beween concepts. This constitutes a network representing conceptual structure, and we also call such a network
Makoto NagaoJ TsujiiK. MitamuraHideki HirakawaMasako Kume
Makoto NagaoJ TsujiiJunichi Nakamura
Sergei NirenburgChristine Defrise
Maimitili NimaitiYamamoto Izumi