In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 child is wearing a red shirt and raising their arms. Sentence 2: the child is a boy
Example Output: The boy is jumping outside.

Example Input: Sentence 1: Punk rock teenager walks with a mean look on his face. Sentence 2: The angry teenager had a mean look on his face.
Example Output: The teenager walked with a mean look on his face.

Example Input: Sentence 1: A large group of youths sitting and socializing on a graffiti-covered cement wall. Sentence 2: A large group of youths wasted time in sitting and socializing on a graffitipcovered cement wall.
Example Output:
A large group of youths spent time on Graffiti-covered wall.