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 young Asian boy running with a white and gray dog on green grass. Sentence 2: A boy and his dog are outside.
Example Output: The boy is giving his dog a bath.

Example Input: Sentence 1: Many dogs are running the same way in a field. Sentence 2: Many dogs are running together
Example Output: Cats are chasing birds

Example Input: Sentence 1: A girl red and white striped, one-sleeved outfit stands with her arms raised in the air. Sentence 2: The girl has her arms up.
Example Output:
The boy is wearing black.