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: When Christian had his heart attack, his whole family was in shock. Sentence 2: He was the only one who was fit and healthy among them. Sentence 3: They asked the doctor what had happened. Sentence 4: But he didn't understand why Christian had been so unlucky. Sentence 5: His body had just given up without a reason. Choices: a. Robot. b. Dying without a reason.

b