Word sense annotation is regarded as one of the most difficult annotation tasks (Artstein and Poesio, 2008) and building manually-annotated corpora with highquality sense labels is often a time-and resourceconsuming task.
nearly all sense-tagged corpora in wide-spread use are created using trained annotators (Hovy et al., 2006;Passonneau et al., 2010), which results in a knowledge acquisition bottleneck for training systems that require sense labels (Gale et al., 1992).