4 Argumentative Relation Tasks 4.1 Task 1: Support vs. Non-support Our first task follows<cite> (Stab and Gurevych, 2014b)</cite> : given a pair of source and target argument components, identify whether the source argumentatively supports the target or not. Note that when a support relation does not hold, the source may attack or has no relation with the target compo- <cite>Stab and Gurevych (2014b)</cite> split the corpus into an 80% training set and a 20% test set which have similar label distributions. We use this split to train and test our proposed models, and directly compare our models' performance to the reported performance in<cite> (Stab and Gurevych, 2014b)</cite> .