However, many agreement studies have restricted annotators to using a single sense, which can significantly lower inter-annotator agreement (IAA) in the presence of ambiguous or polysemous usages; indeed, multiple studies have shown that when allowed, annotators readily assign multiple senses to a single usage (Véronis, 1998; Murray and Green, 2004; <cite>Erk et al., 2009</cite>; Passonneau et al., 2012b) .