In this task, you're given a pair of sentences, sentence 1 and sentence 2, that contradict each other. Your job is to alter sentence 2 so that the pair agree with 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 white dog that is muddy walks across the green grass. Sentence 2: A cat walks across green, healthy grass.
Example Output: A dirty dog treks through grass.

Example Input: Sentence 1: A mountain biker hops over an obstacle. Sentence 2: A person swims in a pool.
Example Output: A person is outside.

Example Input: Sentence 1: A young boy in coat sits in a pile of leaves. Sentence 2: A girl in a dress is playing with leaves.
Example Output:
A boy in a coat is sitting.