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 large dog is laying on its back, outside on a blacktop, with its legs in the air. Sentence 2: Dog laying on its back
Dog swimming in water

Sentence 1: One girl is standing on the street, and the other is crouching looking at something on the ground. Sentence 2: A girl is preoccupied with something on the ground.
A teacher is talking to her classroom.

Sentence 1: A small group of people are visiting each other outside. Sentence 2: a group of people are hanging out together

a group of people are inside the building enjoying food