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.

[EX Q]: Sentence 1: Children play with a remote-control boat in a pond with a boat house. Sentence 2: Childern crash the boat.
[EX A]: Childern are playing

[EX Q]: Sentence 1: Men standing on scaffolding are working. Sentence 2: Men cleaning windows.
[EX A]: Men are at work on a building.

[EX Q]: Sentence 1: A boy is doing a skateboarding trick in the air. Sentence 2: A boy is wearing a helmet.
[EX A]:
A boy is riding a skateboard.