The disclosed invention is to be able easily and quickly grasp the gist of the article and schematic sense of natural language sentences. ; In the present invention, to achieve thereof, the input for the document information, and storing; Type, the method comprising: parsing and storing on the stored data; Storing the ontology data is confirmed by extracting the main components in each phrase; Storing a data value identified by an abstract sense of selected main components; Storing a plurality agent door having a probability between phrases from the stored value in the step identified by the value selected; Combination with reading the corresponding value of the hold with respect to the selected main component means abstract grammatical sentence summary, storing; If the output control signal is provided, the document summary sentence abstraction method utilizing gaeyeon rule comprises the step of outputting, show a combination, mutator stored value in said step. ; Documents, sentences, phrases, abstract, abstraction, plausibility
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