World Wide Web is now widely used as a tool for daily information search. One important usage of WWW is to search local information. Our paper discusses human cognition on geographic space. In Japanese text data, most place names appear with case intensifying particles. We performed analysis on case intensifying particles and characterized place names based on which particles it is likely to co-occur with. There are many place names that have more than one meaning: the original meaning and the extended meaning, which surrounds the original. We showed that the characterization based on case intensifying particles could be used to determine such duplication of meaning.
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