Definition: In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.
Input: Title: Thunder Storm. Sentence 1: A big thunderstorm rolled through a town. Sentence 2: Little Belle is afraid of thunder and lightning. Sentence 3: She immediately runs to her dad. Sentence 4: Her dad always makes her feel safe. Choices: a. Belle doesn't know her dad is afraid of thunder too. b. Terry rose from the water, with the toy fin on his head.
Output:
b