TASK DEFINITION: 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.
PROBLEM: Sentence 1: Some people are standing outside at a sidewalk book sale. Sentence 2: People browse a sidewalk book sale.

SOLUTION: A bookstore is on fire.

PROBLEM: Sentence 1: Four men are rollerskating in a line, with the last three holding onto the hips of the man ahead of them. Sentence 2: Four men are forming a congo line.

SOLUTION: A group of guys carrying surfboards.

PROBLEM: Sentence 1: Four men doing a martial arts stance in front of onlookers. Sentence 2: Four men are in martial arts stances in front of onlookers

SOLUTION:
Four men are relaxing casually having a beer