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: Anna ordered a diet soda with her lunch. Sentence 2: She began to gulp it down thirstily. Sentence 3: But then she stopped and grimaced. Sentence 4: The soda cartridge must be empty- she was drinking pure seltzer! Sentence 5: She hurried to the counter to inform the employees.

Seltzer