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.

Sentence 1: A skateboarder does a stunt in the city. Sentence 2: A skateboarder does a trick for the crowd.
A person is skateboarding in the city.

Sentence 1: A tattoo artist wearing a hat at work. Sentence 2: A tall human in a hat.
A human in a hat.

Sentence 1: A rollerblader is jumping over a blue barrel. Sentence 2: the barrel is about 3 foot high

the rollerblader is jumping a barrel