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: When I was walking in the park, a dog came running up to me. Sentence 2: I didn't recognize the dog, so I looked for his owner. Sentence 3: The dog and I walked around the park for awhile. Sentence 4: A man showed up yelling out the dog's name. Sentence 5: The dog ran to him and they were reunited with each other.

Finding a lost dog