In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 young Asian girl is purchasing an item from a vending machine. Sentence 2: A girl is getting a soda from a vending machine.
Example Output: A girl is using a vending machine.

Example Input: Sentence 1: Nine people riding their horses. Sentence 2: the people are riding their horses on a trail.
Example Output: horses are being ridden

Example Input: Sentence 1: A female martial arts student demonstrates with a weapon while others watch. Sentence 2: the people watching are all men
Example Output:
A woman learning martial arts is demonstrating the use of a weapon in front of an audience.