In this task, you're given a pair of sentences, sentence 1 and sentence 2, that agree with each other. Your job is to alter sentence 2 so that the pair 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 guy wearing a black shirt and a red hat riding his skateboard. Sentence 2: A guy is riding a skateboard.
A guy is riding a scooter.

Sentence 1: Several large dogs are running through a large grassy area. Sentence 2: A group of dogs is moving quickly outdoors.
Several large dogs are napping on a rug in the sunshine.

Sentence 1: A ribbon dancer wearing a neon pink and green outfit with only one left white sleeve leaps high into the air- throwing her ribbon out before her in a "c" shape. Sentence 2: A person is using her ribbon to make shapes.

A musician is practicing singing in front of the mirror naked.