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.

Q: Sentence 1: Four bicyclists wearing helmets are racing along a city street while onlookers observe. Sentence 2: For bicyclists are racing in the Tour de France.

A: Four people are racing bicycles.
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Q: Sentence 1: A small white dog is jumping over a branch on the ground covered with leaves. Sentence 2: Small dog is chasing a rabbit

A: Small dog playing outside
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Q: Sentence 1: Boy skateboarding on residential street, falling farward with hands on the ground. Sentence 2: A boy wearing a red shirt is falling off his skateboard.

A:
A boy is falling off his skateboard.
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