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.

Sentence1: Jim was farting a lot more than usual. Sentence2: His wife became concerned because they smelled unusually terrible. Sentence3: She insisted that he go see a doctor. Sentence4: Jim's doctor told him he is becoming lactose intolerant.
Jim's wife was relieved to find the source of the problem.