10. The information processing apparatus according to claim 5 , the conversion unit replacing the identical quotation in a plurality of the texts with identifiers for identifying the quotation.
10. The information processing apparatus according to claim 5 , the conversion unit replacing the identical quotation in a plurality of the texts with identifiers for identifying the quotation. 11. The information processing apparatus according to claim 10 , the text mining unit respectively measuring the numbers of occurrence of the quotations of different contents in the converted texts.