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: Men standing on scaffolding are working. Sentence 2: Men cleaning windows.
Men are at work on a building.

Sentence 1: A man wearing glasses is singling while holding a guitar while a shirtless man in a fedora plays drums. Sentence 2: A person is singing a song he wrote.
People are making music together.

Sentence 1: Dog with big collar running. Sentence 2: A corgi with a big collar is jogging beside his owner.

A dog is wearing a collar while playing.