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: People setting up to sell on the street their food. Sentence 2: People are getting ready to sell their goods.
Example Output: People are running away.

Example Input: Sentence 1: Black and white dog chewing on a canon camera setting in the grass the camera is black and white. Sentence 2: The dog was chewing on the black white camera while sitting on the grass.
Example Output: The dog was playing in the water.

Example Input: Sentence 1: A man mountain biking with a blue helmet Sentence 2: A man riding his bike.
Example Output:
Someone is a red helmet parked with their bike.