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: My brother's brother-in-law has a tube in his body. Sentence 2: He had a tube inserted when he was unable to urinate in 2014. Sentence 3: Now he can urinate 30% of the time. Sentence 4: Yesterday, the hospital removed his tube. Sentence 5: They are hoping he has regained full functionality. Choices: a. Operation. b. Baseball.

a