Given a pair of event mentions, the classifier predicts one of the four temporal relations between them: before,āfter,ōverlap andno relation.
: For training of the classifiers, we define a set of features following some previous work (Bethard et al., 2007;Chambers and Jurafsky, 2008;Yoshikawa et al., 2009), together with some additional features that we believe to be helpful for the interval-based representation.