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: Beatrice heard whimpering outside her front door. Sentence 2: She opened the door to see what was outside. Sentence 3: A little white dog sat on her doorstep. Sentence 4: Beatrice found the dog's owner's phone number on its tags. Sentence 5: She called the owner and told him she found the dog.

Lost Dog