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: A white and black dog runs on the grass. Sentence 2: The dog is a dalmation.
Example Output: A dog is running outside.

Example Input: Sentence 1: Three men standing around a car on a racetrack. Sentence 2: The car is stolen.
Example Output: Three men are gathered around a car.

Example Input: Sentence 1: A baseball player with a red helmet is hitting a baseball. Sentence 2: A person hit a homerun.
Example Output:
A person is playing baseball.