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 construction worker leaning against a post. Sentence 2: A construction worker is not currently working.
A construction worker is diligently hammering some nails.

Sentence 1: Person listening to mp3 player sitting on curb. Sentence 2: A person sits outside while listening to their mp3 player.
She listens to her iPod while jogging.

Sentence 1: Two men are walking at an intersection through a market. Sentence 2: Humans walking

Nobody is walking