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: Log Billson was a worker at a dynamite plant. Sentence 2: One day, the plant caught fire. Sentence 3: Log stayed on-site for 12 hours, fighting the fire. Sentence 4: He ushered hundreds of workers to safety. Sentence 5: He collapsed after the 12th hour just as the factory exploded. Choices: a. Broken Arm. b. Dynamite.

b