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 man in a black shirt and jeans is barbecuing outdoors. Sentence 2: A man is outside cooking on the grill.
Example Output: A man sits on the couch and reads.

Example Input: Sentence 1: A group of people wearing white, orange and yellow outfits pose for a picture with a burning effigy in the background. Sentence 2: A group of people wear colorful outfits.
Example Output: People are gathered at a shopping mall to meet for coffee.

Example Input: Sentence 1: A man is riding an elephant while another person is touching the elephant's head. Sentence 2: An elephant is being ridden by a man.
Example Output:
A woman is riding an elephant while another person is touching the elephant's head.