“…3.2 Studies developing methods for gender and age prediction 3.2.1 Gender 44 studies developed ad-hoc methods to predict the Twitter user's gender. Of these, 32 predicted only gender 28,29,31,33,36,37,47,48,50,51,54,55,58,60,61,64,65,68,71,72,75,81,[83][84][85][86]90,92,94,96,100,101 and gender was predicted along with the user's age in 12 34,44,49,59,62,66,80,80,87,89,91,95 .…”