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.

Q: Sentence 1: A race car spins on the track. Sentence 2: A race car crashes.

A: A race car takes the lead!
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Q: Sentence 1: A little boy is riding a dirt bike with the number seven on it going down a hill. Sentence 2: A little boy is going downhill.

A: A little boy is driving a car.
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Q: Sentence 1: A man sitting upon a roof is using a tool. Sentence 2: A person using a tool

A:
Nobody is using a tool.
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