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: Tom lost his wallet downtown. Sentence 2: He looked everywhere for it. Sentence 3: After a week he got it back in the mail. Sentence 4: Everything was still in it. Sentence 5: Tom never found out who returned it.

Lost Wallet