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: Tom was walking in the mall one day. Sentence 2: Tom was tired of buying things and wanted to help the community. Sentence 3: Tom was walking around the mall. Sentence 4: He saw a blood donation booth. Sentence 5: He donated blood and felt great about helping others. Choices: a. Horror Movie. b. Blood.

b