You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1: Lisa turned thirty-five last weekend. Sentence 2: Her friends threw her surprise birthday party. Sentence 3: Everyone that was close to Lisa attended. Sentence 4: The party became a little too loud and police were called. Sentence 5: Lisa will never forget this birthday party. Choices: a. Lisa. b. Fireworks 2.
Output:
a