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: Onlookers view picture with wires and lights. Sentence 2: The picture is on a wall.
Example Output: A pictur is being looked at.

Example Input: Sentence 1: Five hikers, one facing towards the camera and the others facing away from it, are walking through a rocky riverbed. Sentence 2: 5 hikers are fording a river.
Example Output: Five people are hiking.

Example Input: Sentence 1: A man in a green sheet is in midair on a green-wheeled skateboard at a skateboard park. Sentence 2: A man is doing a skateboarding trick outside.
Example Output:
A man in green is skateboarding.