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 person is walking up stairs between two buildings. Sentence 2: The person is headed towards the roof of the building.
Example Output: A person is going up the stairs.

Example Input: Sentence 1: Two workers face each other wearing green attire. Sentence 2: Two workers are wearing green clothing which is their uniform.
Example Output: Two workers are wearing green clothing.

Example Input: Sentence 1: A guy racing his motorcycle. Sentence 2: A man racing his motorcycle comes in first.
Example Output:
A person on a vehicle.