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 boy was standing in his backyard. Sentence 2: He looked up and saw something hovering above him. Sentence 3: It had lights and was big and metal. Sentence 4: He screamed and ran inside. Sentence 5: He saw it take off across the sky.

The UFO