In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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: The white dog has a blue shirt on and is behind a black dog with a rellow shirt on. Sentence 2: The white dog is chasing the black dog.
Example Output: Two dogs are wearing shirts.

Example Input: Sentence 1: A white dog walking beside a bicycler. Sentence 2: A puppy is running
Example Output: A dog walking beside a person on a bike.

Example Input: Sentence 1: A older man walks down a quiet street. Sentence 2: A person is outside on the road.
Example Output:
A man is taking a walk down the road.