In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 young girl dressed in gray kneels to look at a dog. Sentence 2: She is teaching the dog a trick.
Example Output: The girl is looking at the dog while wearing gray.

Example Input: Sentence 1: A man is enjoying a bottled beverage as he walks down the street. Sentence 2: A man was drinking a beer walking down the street.
Example Output: The man is walking down the street.

Example Input: Sentence 1: A girl is adding a vial of blue liquid to a glass container, while another girl looks on. Sentence 2: A tall person looking on
Example Output:
A girl is adding a vial of blue liquid to a container.