In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 young man sits with his elbows on his legs while he reads a book. Sentence 2: A teenager is flipping through a book in the library.
A book reader is engrossed in his book.

Sentence 1: A young girl playing is a sprinkler fountain jumps on a yellow concrete spot. Sentence 2: The girl is playing a game in which she neads to stay on the yellow spot.
A girl is playing in a fountain.,

Sentence 1: Several small children are playing basketball. Sentence 2: Siblings are playing.

Children are playing.