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: A small town was preparing to cut down some trees. Sentence 2: They needed to make space for a new library. Sentence 3: Arnold's favorite old tree was being cut as well. Sentence 4: He didn't want it to be cut so he tied himself to it. Sentence 5: Luckily his protest worked and they managed to avoid that tree. Choices: a. Uninvited Guest. b. The Tree Savior.

b