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: Two costumed women holding a poster entitled "prom night". Sentence 2: Two women are in costume.
'Anaconda' cosplayers are holding a giant snake at the convention.

Sentence 1: A group of young men is buried up to their chest in sand. Sentence 2: A group of guys buried in the sand.
A group of young men swim in the ocean.

Sentence 1: A musician wearing a red scarf on his head and holding a microphone, wipes his face as he walks away from a smiling DJ. Sentence 2: The man is performing

The two men are lighting fireworks in the park.