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: Carla's dog found a way to leave her backyard. Sentence 2: Carla was devastated that her dog was gone. Sentence 3: She called her neighbors to see if they have her dog and they didn't. Sentence 4: So she posted poster with a picture of her dog all over town. Sentence 5: Three weeks later someone called because they found her dog.

Lost dog