In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair 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 guy wearing a black shirt and a red hat riding his skateboard. Sentence 2: A guy is riding a skateboard.
Example Output: A guy is riding a scooter.

Example Input: Sentence 1: Baby in a lavender onesie lying on a pastel green blanket on a couch crying. Sentence 2: The baby is not happy right now.
Example Output: The baby has just learned to walk.

Example Input: Sentence 1: Two people overlooking a body of water are embracing. Sentence 2: Some people embracing.
Example Output:
Just water.