5 For obvious sparsity issues, we did not include classes corresponding to disjunctive relations, as there are 2 |R| possible disjunctions for each relation set R. For training our models, we experiment with 4 various configurations that correspond to ways of expanding the set of training examples.
these configurations vary in: (i) whether or not we added the additional "Bethard relations" to the initial OTC annotations (Bethard et al., 2007), (ii) whether or not we applied saturation over the set of annotated relations.