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: The family was at the park. Sentence 2: A loud thunder clap rang out. Sentence 3: The family watched the cloud roll in. Sentence 4: A tremendous storm began. Sentence 5: The family scrambled to shelter.

thunder