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: A pit crew working on a race car. Sentence 2: They are changing tires.
answer:
People are working on a car.


question:
Sentence 1: A young boy playing in a swimming pool Sentence 2: The boy is with his family.
answer:
The boy is outdoors.


question:
Sentence 1: A man is stretching on a walkway next to a bridge. Sentence 2: He stretches before continuing on his run.
answer:

The man stretches his muscles.