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 small child in a SpongeBob outfit is using a mop on a floor. Sentence 2: A child is mopping.
A child works outside on the house.

Sentence 1: A dog running on the sand. Sentence 2: a dog is running on sand
a dog is playing with sheep in a grass field

Sentence 1: Two men sitting next to a tall stone. Sentence 2: Two men are present.

The two men are not sitting near an object.