In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 biker in uniform suspended in air in front of a crowd of people. Sentence 2: A biker is wearing a police uniform.
A human is suspended in air.

Sentence 1: One man in the back of a truck working on a farm with animals in the background. Sentence 2: A man in the back of a farm truck is being watched by local sheep.
A man on a truck on a farm is working near animals.

Sentence 1: Three boys play along a decortive wall outside of a building. Sentence 2: Three brothers play outside.

Three boys play outside.