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 family, grandparents, parents, and children, are sitting in front of a fireplace and a christmas tree opening presents. Sentence 2: A family, grandparents, parents, and children, are sitting
A family, grandparents, parents, and children, are not sitting

Sentence 1: A woman and her daughter are walking through the subway station wearing shorts. Sentence 2: A woman and her daughter walk through the subway station.
A woman and her daughter are hailing a taxi.

Sentence 1: Miami tennis player hits the ball with a forehand. Sentence 2: The tennis player is playing tennis.

The tennis player is about to hit a baseball.