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.

Ex Input:
Sentence 1: People with numbers on their chests are running in a pack. Sentence 2: Marathon runners end up grouped together after a collision between runners.

Ex Output:
People in a race are grouped together.

Ex Input:
Sentence 1: Two women look at a cameraman while walking through a crowd. Sentence 2: A cameraman is filming a Girl's Gone Wild video.

Ex Output:
A cameraman is filming two women walking through a crowd.

Ex Input:
Sentence 1: A police officer waves at a street fair. Sentence 2: The police officer waves as the crowd cheers for him.

Ex Output:
There is a person waving.