In an event-based semantics, it is natural to construe [2b] as quantifying over events, just like [2a] quantifies over individuals. In conjunction with the DRT treatment of quantification, this allows us to interpret the tense in “slapped” as referring back to the event introduced in the subordinate clause, along the following lines (where ⊃⊂ stands for the “right after” relation, e″ is the variable introduced by the tense in “slapped”, and e″ indicates that e″ requires an antecedent):