Fig. 3

a - The distribution of screen time per person fits a log-normal distribution and shows a few people actually hold most of the total screen time. b - Face detections in a topic usually average a total of about 24s. c - 80 % of the topics detect only one person. d - The distribution of time (in days) between two appearances of I. Ozawa, which is of one day most of the time, is characteristic of the “bursty” behavior of the data