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 white dog runs on the grass. Sentence 2: A white animal is outdoors.
A black cat sits in the hedges.

Sentence 1: A skier splits his or her legs while flying throught the air over a ski hill. Sentence 2: A skier splits his or her legs while flying through the air.
A skier is on the ground.

Sentence 1: A black and white dog jumps after a yellow toy. Sentence 2: A dog chases after a toy.

A dog plays alone.