instruction:
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.
question:
Sentence 1: Man in a white shirt jumping toward a brick wall. Sentence 2: A man jumps toward a wall to catch the ball
answer:
A man jumping toward a wall


question:
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
answer:
A man on a surfboard rides a wave


question:
Sentence 1: A person on a snowmobile. Sentence 2: A person is riding a snowmobile.
answer:

A person is sitting on a snowmobile.