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 young asian boy enjoys his toy. Sentence 2: A young boy is happy with his new toy.
Example Output: A young boy is playing.

Example Input: Sentence 1: A man on a steep incline wearing a white shirt is working on a roof, with lots of debris all around. Sentence 2: A man is cleaning all the trash off a roof.
Example Output: The man is doing work.

Example Input: Sentence 1: A young boy tries to catch an orange and yellow Frisbee in a green, grassy field. Sentence 2: A boy is playing with his favorite frisbee.
Example Output:
A boy is in a field