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: Various people sitting and talking in a room. Sentence 2: there are variety of people giving presentation and doing discussions
Example Output: A girl catching a bus in the city.

Example Input: Sentence 1: A person is climbing a rock while holding onto a white rope. Sentence 2: The person is outdoors.
Example Output: The rope is made of black nylon.

Example Input: Sentence 1: one dog standing in some grass with his tongue hanging out and a tan dog in the background Sentence 2: Both of the dogs are outside.
Example Output:
The dog has his mouth closed.