... bag-of-words model (Buczynski & Wawer, 2008;Zhang, Jin, & Zhou, 2010) or TF-IDF (Davidson, Warmsley, Macy, & Weber, 2017;Kocoń, Janz, & Piasecki, 2018a;Sahlgren, Isbister, & Olsson, 2018;Senarath & Purohit, 2020). They are often enhanced with extra concepts from the given ontologies (Bloehdorn & Hotho, 2004) or WordNets (Bartusiak, Augustyniak, Kajdanowicz, Kazienko, & Piasecki, 2019;Janz, Kocon, Piasecki, & Zasko-Zielinska, 2017;Kocoń & Maziarz, 2021;Maziarz, Piasecki, Rudnicka, & Szpakowicz, 2013;Misiaszek et al., 2014;Piasecki, Broda, & Szpakowicz, 2009;Scott & Matwin, 1998) and used together with classical methods, such as SVM (Piasecki, Mlynarczyk, & Kocon, 2017;Razavi, Inkpen, Uritsky, & Matwin, 2010;Senarath & Purohit, 2020) or logistic regression (Davidson et al., 2017;Kocoń, Janz, & Piasecki, 2018b;Kocoń & Piasecki, 2012;Sahlgren et al., 2018;Waseem & Hovy, 2016). ...