4. The scenario generating apparatus according to claim 1 , further comprising: an editing resource generator that generates editing resource information from the acquired external information, wherein the scenario editor edits the scenario generated by the scenario generator using at least one of the acquired external information and the editing resource information generated by the editing resource generator.
6. The scenario generating apparatus according to claim 4 , further comprising: a scenario editing knowledge storage that stores scenario editing knowledge, comprising a combination of a knowledge application requirement for specifying information anticipated from a term in the scenario, at least one of external information that needs to be acquired according to the knowledge application requirement and editing resource information, and an editing rule specifying how to edit the scenario using at least one of the acquired external information and the editing resource information, wherein the scenario editor specifies information anticipated from the term in the scenario generated by the scenario generator and edits the scenario generated by the scenario generator according to the editing rule using at least one of the external information acquired according to the knowledge application requirement and editing resource information, with reference to the scenario editing knowledge stored in the scenario editing knowledge storage .