33. The non-transitory computer-readable recording medium according to claim 32 , wherein the (b) step comprises deriving, based on the result of the determination in the (a) step, an extent to which the content of the homogeneous segment is included in the second text corresponding to the other first text which includes the homogeneous segment, further deriving, based on the derived extent, a degree to which each segment constituting the first text which is set as the analysis target should be described in the second text corresponding to the first text which is set as the analysis target, and performing the determination using the degree.
34. The non-transitory computer-readable recording medium according to claim 33 , wherein the (x) step, in addition to the determination regarding the content of each segment, comprises computing, for the plurality of segments respectively constituting all of the first texts, an inclusion score representing a possibility of the content of each segment being included in the second text corresponding to the first text which includes the segment, and the (b) step further comprises deriving the degree using the inclusion score computed in the (x) step, such that the degree increase the higher the inclusion score.