Features

Label

Gender

Male, Female

Age

Teenager (<20), Youth (21 - 40), Middle-aged (41 - 60), Elderly (>61)

Occupation

Student, Enterprise employee, Employees of public institutions, Freelance

Education

Junior high school, High school, Undergraduate, Graduate

Learning interest

Subject 1, subject 2, …, subject N

Learning pattern

Video, Text, Exercise

Forum participation

Diving (forum posts = 0), Bubbling (1 - 10), Active (>10)