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: Sonia took her toddler to visit the aquarium. Sentence 2: First they looked at the seahorses. Sentence 3: Then they saw stingrays and sharks. Sentence 4: But her child's favorite thing to watch was in the coral reef exhibit. Sentence 5: A man wearing a scuba suit was inside cleaning the tank! Choices: a. Aquarium. b. Shopping Trip.

a