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 group of people are in a large raft on choppy water. Sentence 2: A group of people are rafting on the river.
Example Output: There are people rafting.

Example Input: Sentence 1: A man holds an orange juice carton on a grocery store shelf while a woman looks further down on the shelf. Sentence 2: A tall man.
Example Output: A man holds a carton.

Example Input: Sentence 1: A man in a green plaid shirt performing some karaoke with a guitar in front of a small crowd. Sentence 2: Someone is singing with a microphone.
Example Output:
Someone is performing music.