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 group of children sit on the floor against a brick wall while a woman observes them. Sentence 2: The woman is the kids' teacher.
answer:
There are kids being watched by a person.


question:
Sentence 1: A person is falling off their surfboard. Sentence 2: A person falls from their surfboard in a competition.
answer:
A person falls.


question:
Sentence 1: Woman vaulting over a vaulting horse. Sentence 2: A profession athlete vaults over a vaulting horse at the olympics.
answer:

A woman is participating in a sport.