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: Jeff went downstairs to clean his saltwater fish tank. Sentence2: There was a lot of algae growing on the back of the tank. Sentence3: He used a scraper to loosen the algae. Sentence4: The fish hid in the decorative structures on the bottom of the tank.

Jeff used a net to collect the algae and the water looked cleaner.