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: Bob was helping his girlfriend paint her nails. Sentence2: He told her it was easy, no problem! Sentence3: But as he started to paint, he slopped polish all over her fingers. Sentence4: When he finished, her hands were a mess!

Bob realized he was pretty bad at nail-painting, after all.