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: Bob built homes for a living. Sentence 2: One day while working on a home, Bob felt a sharp pain in his chest. Sentence 3: Bob was taken to the hospital by a coworker. Sentence 4: After many tests, the doctor discovered that Bob had pulled a muscle. Sentence 5: Bob then returned to the home to continue his work. Choices: a. Mango. b. Homebuilder Bob.

b