In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair 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: Four couples, all wearing green are dancing outdoors. Sentence 2: Several couples in green dancing outside.
Example Output: One couple is swimming.

Example Input: Sentence 1: A girl jumps rope on a sidewalk. Sentence 2: A girl is jumping rope outside.
Example Output: A boy is playing cards with his friend.

Example Input: Sentence 1: A single runner is watched by onlookers in a race. Sentence 2: A man is running in a race.
Example Output:
A man is winning a bicycle race.