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: three men in brown shorts are walking on rocks beside a river. Sentence 2: Three men are hiking.
Example Output: Some men walking on rocks.

Example Input: Sentence 1: Some people standing at the corner of a street, in the crosswalk, waiting for the light to change so they can cross the street. Sentence 2: The people are getting impatient waiting for the light to change.
Example Output: The people are waiting for the streetlight to change colors.

Example Input: Sentence 1: a woman holding a fan at a martial arts event Sentence 2: A woman is cheering in the audience of a martial arts competition.
Example Output:
A woman is observing a martial arts event.