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: Sarah had a fear of being around others. Sentence2: She decided to force herself to go to a party. Sentence3: At the party, she became dizzy and nervous. Sentence4: Sarah decided this was enough, and went to see a therapist.
The therapist taught her ways to cope with her problem.

Sentence1: Tom liked to herd cattle. Sentence2: He did it every day. Sentence3: One day a cow went free. Sentence4: He searched everywhere.
He found the cow and brought it back.

Sentence1: I found a swimming pool full of green water this morning. Sentence2: I took a water sample to my local pool supply store. Sentence3: The sales lady ran tests and sold me quite a lot of chemicals. Sentence4: I put the chemicals in my pool over the next two days.
Saturday morning my pool finally looks crystal clear and clean.