Abstract: An information processing device according to one aspect of the present invention comprises: input means whereby a first named-entity classification is inputted for a second character string within a first character string; and display means whereby information about an estimated second named-entity classification for a third character string different from the second character string is displayed on the basis of the first named-entity classification. The information about the second named-entity classification may be a visual attribute that corresponds to the second named-entity classification.