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: I decided to go to a rock concert at the last minute. Sentence 2: I bought a ticket at the grocery store. Sentence 3: I got to the venue and my ticket was on the 5th row. Sentence 4: I was very happy with my seat. Sentence 5: I enjoyed the performance. Choices: a. Thrift Store Hat. b. Rock Concert.

b