In our study, after we decided on the six categories (heavy study load, lack of social engagement, negative emotion, sleep problems, diversity issues, and others), we took a random sample of 500 tweets, and categorized them separately. If a tweet does not convey any of the five prominent problems, it is categorized as “others”. A tweet in “others” can be an engineering student problem other than the five prominent ones, or a noisy tweet that does not have clear meaning. Unlike the five prominent themes, “others” is an exclusive category.