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: Unexpected meeting. Sentence 1: John made plans to meet with a friend on Saturday. Sentence 2: But while going to their usual meeting place, he met someone. Sentence 3: She was sitting right in front of him in the subway. Sentence 4: They smiled and blush. Choices: a. And john forgot all about his appointment with his friend. b. He brought the mugger to the police station to interrogate him.
Output:
b