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: Dan heard that his neighbor had just become a widow. Sentence 2: Dan wanted to help her but didn't want to be insensitive. Sentence 3: Dan decided to help the widow financially. Sentence 4: Dan mailed her an anonymous money order for fifty thousand dollars. Sentence 5: To this day, the widow doesn't know who gave her that money. Choices: a. Thud. b. Good Neighbor.

b