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 person standing on a stage in front of a seated crowd Sentence 2: Someone is performing for others.
Someone is standing on stage in front of a crowd.

Sentence 1: A person sitting on a lift over water with another person handing a bag to them. Sentence 2: A person sitting with their friends.
A person sitting.

Sentence 1: Construction worker working in a subway tunnel. Sentence 2: A man is fixing a subway car.

A man is working underground.