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: Torsty Torsdie opened up a rusty metal box. Sentence 2: Inside he found a bunch of old pictures. Sentence 3: He thought he recognized one of the people. Sentence 4: He took the picture to his mother. Sentence 5: She smiled, and said it was his grandmother. Choices: a. Torsty. b. Summer.

a