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: Two vehicles are parked outside a small grocery store. Sentence 2: Two vehicles are not moving.
Example Output: The vehicles are driving away from the grocery store.

Example Input: Sentence 1: Individuals are building a house. Sentence 2: People are building a house.
Example Output: A construction crew is demolishing a house.

Example Input: Sentence 1: A shirtless man rides a skateboard. Sentence 2: A man with no shirt performs on a skateboard.
Example Output:
A man with no shirt is swimming in the deep end of the pool.