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: Two brightly colored chickens stand outside of a pub. Sentence 2: Chickens are outside a bar.
One chicken stands outside a pub.

Sentence 1: A child is sliding down a hill on a sled. Sentence 2: The child was outdoors.
A child is sliding up a hill on a sled.

Sentence 1: A bike rider jumps through the air while being filmed. Sentence 2: A bike rider jumps through the air.

A bike rider wrecks his bike.