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: On March 8, 2013, we decided to go to a restaurant. Sentence 2: We could not start the car. Sentence 3: A door was ajar overnight and the battery died. Sentence 4: We got a jump and ran the car for an hour. Sentence 5: By then it was too late to go to the restaurant. Choices: a. Dead Battery. b. The Mystery.

a