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: Jack was a senior football player. Sentence 2: One day during practice, he hit his head. Sentence 3: He was sent to the doctor. Sentence 4: The doctor diagnosed him with a concussion. Sentence 5: Jack was not able to play for 3 weeks. Choices: a. Lunch. b. Football.

b