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: Soccer player in white and green dives for the ball as he defends against his opponent in black. Sentence 2: These people are trying out for an MLS team.
Somebody here is not standing perfectly upright.

Sentence 1: Two dogs are running in a grassy field. Sentence 2: Two hunting dogs are running in a grassy filed.

Two dogs are running across a grassy field.