Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: The man was falling from an airplane. Sentence 2: He pulled his primary chute cord. Sentence 3: His chute did not open. Sentence 4: He pulled the backup chute cord. Sentence 5: That parachute opened. Choices: a. sky. b. Gambling.

a