We follow the work of<cite> Stab and Gurevych (2016)</cite> and focus on three different types of features to represent our ACs: (1) Bag-of-Words of the AC; (2) Embedding representation based on GloVe embeddings (Pennington et al., 2014) , which uses average, max, and min pooling across the token embeddings; (3) Structural features: Whether or not the AC is the first AC in a paragraph, and whether the AC is in an opening, body, or closing paragraph.