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: Two lines of colorful cars racing on a racetrack. Sentence 2: Some brightly colored cars are going extremely fast on a track.
Example Output: Some cars are racing

Example Input: Sentence 1: Some men wearing formal clothes stand around a wedding cake. Sentence 2: the men are wearing blue
Example Output: the men are dressed well

Example Input: Sentence 1: A small kid wearing a helmet smiles while his father is doing some adjustment at its back. Sentence 2: The father is tickling the boy.
Example Output:
A little boy is playing on a slide.