Intuitively, the indefinite description “a donkey” in the opening sentence of [1a] serves to introduce an entity that is subsequently picked up by the pronoun “it” in the second sentence, and the DRT account of indefinites and pronouns seeks to formalize this intuitive picture. [1b] shows that a very similar phenomenon occurs in the temporal domain, for in this case it is natural to construe the past tense of the second sentence as being anaphorically dependent on the content of the first: presumably, Juanita slapped Pedro right after he tried to kiss her. In order to capture this idea, DRT adopts an event-based semantics, treating events as semantic values of a designated class of discourse referents. Sentences are now construed like indefinite descriptions in that they, too, serve to introduce discourse referents. For example, the first sentence in [1b] introduces a discourse referent of the event type that represents Pedro’s attempting to kiss Juanita, and the tense morpheme in “slapped” is construed as referring back, very much like an anaphoric pronoun, to that event: by default, the time of Juanita’s slapping Pedro will be taken to be immediately after the time of him trying to kiss her.