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: The man took off in his airplane. Sentence 2: He noticed that his tank was not full. Sentence 3: He returned to the airport. Sentence 4: He filled up the tank with gas. Sentence 5: He took off in his airplane again.

flew