“…Classification [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33] , [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [18], [48], [49], [50] 31(29%) Stemming and Lemmatization [51], [52], [53], [54], [55], [4], [56], [57], [58], [59], [60], [61] 12(11%) Information Retrieval [9], [62], [63], [64], [65], [66], [67], …”