Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Grady had a big aquarium. Sentence 2: He filled it with tropical fish. Sentence 3: He loved looking at the tank while he drifted off to sleep. Sentence 4: He had big plans for adding more fish. Sentence 5: The fish had become his favorite entertainment.

The Fish