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 man in his office, is staring intently at the computer screen, while holding a red pen in his left hand. Sentence 2: A man in his office, is staring intently at the computer screen
Example Output: A man in his office, is not staring intently at the computer screen

Example Input: Sentence 1: An elderly woman is reading a paper in an office. Sentence 2: An old lady is reading a paper.
Example Output: An old guy is jumping rope.

Example Input: Sentence 1: A redheaded lady sits in front of people while showing them crafts. Sentence 2: A lady is showing a group of people some crafts.
Example Output:
A woman is exercising in front of the group of people.