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 had a nice fish tank. Sentence 2: His girlfriend tried to get him a fish for his birthday. Sentence 3: Unfortunately she got him a fresh water fish. Sentence 4: Tom had a saltwater tank. Sentence 5: She apologized and returned it.

Saltwater Fish