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 young guy is a red shirt performing skateboard trick. Sentence 2: A man does a kickflip on his skateboard.
Example Output: A man on a skateboard.

Example Input: Sentence 1: A global group race car. Sentence 2: The sponsor of the race car is Global Group.
Example Output: A race car.

Example Input: Sentence 1: A man is standing next to a yellow cab while holding up a sign with many little yellow street signs on it. Sentence 2: A man is holding up a sign he created for a very important work project.
Example Output:
A cab is next to a man holding up a sign with other signs on it.