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 went to a concert last night. Sentence 2: There was a large protest right outside. Sentence 3: Apparently the musician was not allowed on stage. Sentence 4: It was frustrating. Sentence 5: I then proceeded to go and join. Choices: a. shark attack. b. Massive protest.

b