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 doctor had a patient that was not doing well. Sentence 2: As he kept treating the patient, a large rash developed. Sentence 3: The doctor had no idea what was wrong. Sentence 4: He spent the next day in the hospital library trying to understand it. Sentence 5: The patient died before he found the answer. Choices: a. Quick refresh. b. carpet dog.

a