Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: Billy was going to have his boss over for dinner. Sentence2: He needed to clean up his house. Sentence3: He went to his closet to get his favorite vacuum. Sentence4: Billy got so into vacuuming that he lost track of time.

He was still vacuuming when his boss arrived.