11. The method of claim 9 , wherein the topic label comprises at least two dimensions, wherein the second data set comprises comparable data, and wherein the method further comprises: generating the modified topic label by replacing a word corresponding to one of the at least two dimensions with another word; and obtaining the comparable data that is related to the modified topic label.
11. The method of claim 9 , wherein the topic label comprises at least two dimensions, wherein the second data set comprises comparable data, and wherein the method further comprises: generating the modified topic label by replacing a word corresponding to one of the at least two dimensions with another word; and obtaining the comparable data that is related to the modified topic label. 13. The method of claim 11 , wherein comparing the first data set to the comparable data further comprises determining whether a feature of the extracted features is more frequent in the first data set than the comparable data.