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 biker enjoys a coffee. Sentence 2: A person is having a beverage.
A biker is drinking beer and playing pool with his friends.

Sentence 1: A man playing ball at sunset. Sentence 2: A man is playing ball.
A man is swimming in the pool.

Sentence 1: A boy in a helmet jumps from a makeshift jungle-gym made of tires. Sentence 2: There is a boy.

The boy is sleeping.