In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair contradict each other. Generated sentences must be short, with less than 15 words. New information can be introduced. Avoid using pronouns to confuse the subject of the sentence.

Example Input: Sentence 1: A young boy, dressed in a karate gee and wearing a yellow belt, stands ready to defend himself inside a gym. Sentence 2: A young, yellow Belt, Karate Student is practicing in a Gym.
Example Output: the boy smokes a cigarette at home

Example Input: Sentence 1: A group of children looking at something off-camera. Sentence 2: Children look away from a camera.
Example Output: A group of adults stare into a camera.

Example Input: Sentence 1: A person on a bike wearing a red helmet, riding down a street. Sentence 2: Someone is riding a bike.
Example Output:
Someone is running over children with a bike.