t includes rating data and trust data two data files. Rating data file consists of 49290 users on 139738 different items comments, where each row of data format is: user_id item_id rating_value. For example, 23 387 5, denotes that the comment of user 23 to item 387 is 5. There are 487181 trust comments in the trust data file, where each row of data format is: source_user_id target_user_id trust_statement_value.