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 man climbing a mountain. Sentence 2: The man was in a group who climbed the mountain.
Example Output: The man climbed the mountain.

Example Input: Sentence 1: A man in red pushes his motocross bike up a rock. Sentence 2: A man in a red shirt has trouble pushing his bike.
Example Output: A man wearing red with a bike.

Example Input: Sentence 1: A man and a woman are smiling for the camera but the woman is not looking at the camera. Sentence 2: A couple is smiling for the camera.
Example Output:
Two people are smling.