“…Appendix 4 shows how we categorized each dimension. Most remarkable is the concept of topic diversity for which six different labels have been used in literature: topic (Bae, 2000;Carpenter, 2010;Carroll et al, 1997;Humprecht & Buchel, 2013), frame (Voakes et al, 1996), issue (Day & Golan, 2005;Nord, 2013), theme (Abdulla, 2017;Humanes et al, 2013), subject (R. Rodgers et al, 2004;Ya-Ching, 2007), item (McCombs, 1987) and topical foci (Powers & Benson, 2014). Other examples in which the number of synonyms is higher than three (i.e., orange color in Figure 4) are party and story uniqueness.…”