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: John really liked Mary. Sentence 2: John asked her to go to dinner with him. Sentence 3: Mary accepted the invitation. Sentence 4: They really clicked, laughing and talking all through dinner. Sentence 5: At Mary's door, John successfully went in for a kiss. Choices: a. First Date. b. You Never Know.

a