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: Boy with dark skin, standing on his head with legs spread, at the end of a floating wooden boat. Sentence 2: A boy play on a raft.
The boy is on a boat.

Sentence 1: Busy city street scene displaying pedestrians and automobile traffic. Sentence 2: Cars are stopped at a red light.
There are cars and people on a street.

Sentence 1: A boy is jumping a cement wall with a green skateboard. Sentence 2: the boy is good at skating

the boy is skating