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 woman in a black shirt is holding a picture of another person. Sentence 2: A person holds a photo.
Example Output: A woman in a black shirt is holding a for sale sign.

Example Input: Sentence 1: Two guys performing rock concert, one has short blond-hair who is singing, and the second has long blond-hair and is jamming out on his guitar. Sentence 2: the people are performing
Example Output: the children sleep in the living room

Example Input: Sentence 1: A group of police officers are congregating near their mobile command post. Sentence 2: a group of people are congregating.
Example Output:
A group of fireman are in a fire truck.