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 standing on a surfboard heads away from shore while going over a wave near a small boat. Sentence 2: A skilled surfboarder rides a wave
Example Output: A man on a surfboard rides a wave

Example Input: Sentence 1: A white dog with a black collar runs in the snow. Sentence 2: A dog is playing in a snow bank.
Example Output: There is a dog running outside.

Example Input: Sentence 1: A small boy jumps into a swimming pool. Sentence 2: A child jumps into his pool while his mother watches from the kitchen.
Example Output:
A boy is going swimming.