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: Ava loved to play fetch. Sentence 2: Her owner would throw the tennis ball across the yard. Sentence 3: She would chase it and catch it. Sentence 4: She didn't understand how to give it back. Sentence 5: The owner got frustrated after just a few minutes.

The Tennis Ball