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: Ronald had a very big elbow. Sentence 2: He was always bumping into things. Sentence 3: One day, he bruised his elbow. Sentence 4: Then, Ronald had to rush to the hospital. Sentence 5: The doctor told him that it was nothing serious. Choices: a. Pictures. b. Elbow.

b