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 woman dances in a colorful dress, engaged in a writhing dance taught to her by her elders. Sentence 2: A woman is dancing.
A woman dressed in black sits at a bus stop, waiting for her ride.

Sentence 1: Individuals are building a house. Sentence 2: People are building a house.
A construction crew is demolishing a house.

Sentence 1: A man performs a skateboard trick. Sentence 2: A guy is on a skateboard

The man is riding a bike.