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: Cyclists ride down the street on a sunny day. Sentence 2: bikers are racing each other for the summer race
Example Output: bikers are riding down the street

Example Input: Sentence 1: A man in red pushes his motocross bike up a rock. Sentence 2: A man in a red shirt has trouble pushing his bike.
Example Output: A man wearing red with a bike.

Example Input: Sentence 1: A man in a reflector-vest stands in front of a cement truck near a flagpole. Sentence 2: A sad man in a reflector-vest stands in front of a cement truck near a flagpole.
Example Output:
A person in a reflector-vest stands in front of a cement truck near a flagpole.