“…In the last years, text classification for analyzing blog posts, Twitter or Facebook data became increasingly popular. For social media, predefined categories are often related to some task of sentiment analysis, which aims to measure a positive or negative affect of authors toward certain issues, events, or persons (e.g., Di Fatta & Musotto, 2017; Jungherr, Schoen, Posegga, & Jürgens, 2016; Lewis, Zamith, & Hermida, 2013; Su et al, 2016). Despite its innovative potential, so far there is only little use of supervised learning for CA beyond sentiment classification in social media (Denny & Spirling, 2017).…”