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: Many people on a street while vendors sell items. Sentence 2: The vendor is selling items on a street.
The vendor is inside a museum.

Sentence 1: Several older people with red aprons work at a book fair. Sentence 2: Employees are wearing red.
The aprons used by employees are solid blue.

Sentence 1: A white dog is running with an orange fence behind him. Sentence 2: A white dog is running outside.

A white dog is sitting on the porch.