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.

Example Input: Sentence 1: A pair of young boys dressed in shorts and shirts are playing table tennis. Sentence 2: Some kids playing.
Example Output: A dong pees on the rung.

Example Input: Sentence 1: A woman and child play with a stuffed animal. Sentence 2: A parent entertains his child with toys.
Example Output: A live stuffed animal chases a kid.

Example Input: Sentence 1: A mountain biker hops over an obstacle. Sentence 2: A person is riding a mountain bike.
Example Output:
Someone skateboarding on a halfpipe.