Since manual classification is costly (Kipper et al., 2008) automatic approaches have been proposed recently which could be used to learn novel classifications in a cost-effective manner (Joanis et al., 2008; Li and Brew, 2008; Ó Séaghdha and Copestake, 2008; Vlachos et al., 2009;<cite> Sun and Korhonen, 2009</cite> ).