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 stands behind a wall on a busy city street. Sentence 2: The man is obsured from view outside.
Example Output: The man is walking down a busy city street.

Example Input: Sentence 1: A leader at the front of a group is holding her hands in the air just like what all of the people facing her are doing. Sentence 2: A human is in front of a lot of other humans with her hands raise high.
Example Output: Three elderly people sit quietly on a park bench, feeding the ducks.

Example Input: Sentence 1: Chinese students dressed in blue shirts on a field trip. Sentence 2: A group of students on a field trip.
Example Output:
American students dressed in red shirts.