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 football player in purple is running the ball while another in white attempts to tackle him. Sentence 2: A football player in white tries to tackle a player in purple.
A girl is sitting on her porch.

Sentence 1: A dog running on the sand. Sentence 2: a dog is running on sand
a dog is playing with sheep in a grass field

Sentence 1: Two little boys holding apples near the street. Sentence 2: The boys have apples.

The boys are sleeping.