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 live theater show with five actors on stage doing a choreographed routine. Sentence 2: Actors are practicing choreography.
People are preparing to watch a movie.

Sentence 1: Man wearing hat and glasses working on a bicycle. Sentence 2: A man is working on his bike.
A person is riding his bicycle on the street.

Sentence 1: A woman cleaning her doorway with a broom. Sentence 2: A human cleaning

Nobody is cleaning.