12. The method of claim 11 , wherein preprocessing the text of the blog document includes performing hypertext markup language (HTML) parsing and sentence tokenization of the blog document.
11. The method of claim 1 , wherein classifying the experience sentences that represent actual experience of users and the non-experience sentences that represent no experience in the blog document using the sentence classifier includes: preprocessing text of the blog document; extracting grammatical features from the preprocessed blog document; and classifying the experience sentences and the non-experience sentences using the sentence classifier on the basis of the extracted grammatical features.