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.

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

Example Input: Sentence 1: a black dog jumping over a yellow pole in an obstacle course Sentence 2: A dog jumping over an object.
Example Output: A cat is drinking milk.

Example Input: Sentence 1: A male soccer player attempting to head the ball past the goalkeeper to score a goal. Sentence 2: The player tries to score.
Example Output:
The man head butts his opponent.