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: Two lines of colorful cars racing on a racetrack. Sentence 2: Some brightly colored cars are going extremely fast on a track.
Example Output: Some cars are racing

Example Input: Sentence 1: A person climbing a large moss-covered rock Sentence 2: There is a person on top of a large rock pulling someone else up.
Example Output: A person is climbing a rock.

Example Input: Sentence 1: Two people at the top of a beach side cliff. Sentence 2: The people are watching the sun set on the water.
Example Output:
There are people on the cliff.