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 young boy wearing a blue "24" sports shirt, a girl sipping a juice box and a plastic container with peanut butter and jelly sandwiches. Sentence 2: The girl has juice in her mouth.
The boy is alone in the classroom.

Sentence 1: Two men, one playing a purple guitar and the other playing an accordion, sitting on stone steps. Sentence 2: The men are playing instruments.
The friends are baking some pastries.

Sentence 1: 3 people (2 male 1 female) are replacing the wood chips at a playground, using wheelbarrows. Sentence 2: 3 people are maintaining the local playground

3 people are stealing wood chips in order to sell them on the black market