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: Black and white dog chewing on a canon camera setting in the grass the camera is black and white. Sentence 2: The dog was chewing on the black white camera while sitting on the grass.
The dog was playing in the water.

Sentence 1: A chef prepares a table with food behind it. Sentence 2: A chef is preparing a meal.

A chef cut himself.