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: Sam thought he was a Texan. Sentence 2: He went to a bar with a mechanical bull. Sentence 3: He figured it would be fun to show off. Sentence 4: Sam got knocked off within a second. Sentence 5: He walked off and pretended it didn't happen. Choices: a. Club Night. b. Mechanical Bull.

b