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 skier does a jump in front of an empty chair lift. Sentence 2: The athlete is about to crash land.
Example Output: An athlete hangs in the air next to a machine.

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 woman in a blue shirt guides her dog over an obstacle. Sentence 2: A woman taking her dog on a walk.
Example Output:
A woman guiding her dog.