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 brown dogs licks its black nose. Sentence 2: The brown dog has a black nose.
Example Output: The yellow dog is licking it's nose.

Example Input: Sentence 1: A teenage boy is holding his skateboard. Sentence 2: A boy is posing with a skateboard.
Example Output: A boy is posing with a bicycle.

Example Input: Sentence 1: Two dark-skinned men, one of them with a knife, stand in front of some foliage. Sentence 2: Two men are standing outside.
Example Output:
Two men are sitting down in lawn chairs.