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 black dog jumping over a yellow pole in an obstacle course Sentence 2: A dog jumping over an object.
A cat is drinking milk.

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.

Sentence 1: A man is walking on a wooden floor in front of an orange and green checkerboard light wall. Sentence 2: A man is walking on the floor by a light colored wall.

A woman is reading a book outside.