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: The black and white dog catches the tennis ball in his mouth. Sentence 2: A dog catches a ball.
A dog chases a cat to the shouts of its owner.

Sentence 1: A small child in a SpongeBob outfit is using a mop on a floor. Sentence 2: A child is mopping.
A child works outside on the house.

Sentence 1: A military man walks in front of a procession of people during a parade. Sentence 2: A man is in a parade..

A man walks behind the parade.