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: Two young girls jumping and having fun on a trampoline in a backyard setting. Sentence 2: Two children are playing on a trampoline.
Three children are jumping on a trampoline.

Sentence 1: While visiting the Mayan ruins, a guide points in the direction of more attractions. Sentence 2: They are outside at some ruins.
The guide is showing the rocket.

Sentence 1: Girl with green tank top standing in the middle of a train track with multicolor train cars to the right. Sentence 2: Girl wearing green top standing on a train track with train cars of various colors to her right.

There is nobody on the train track.