Our focus here is on learning the Belief and Desire classes; however, we include verbs from other classes to have a realistic context of MSV acquisition in the presence of other types of verbs.
we include (physical) Action verbs because of their frequent usage in CDS, and we include Communication and Perception groups because of their suggested role in the acquisition of MSVs (Bloom et al., 1989;de Villiers, 2005).