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: A guy, wearing a Superman costume and cowboy hat, is carrying a sign about Designer Bags costing$ 10.00. Sentence 2: A man is holding a sign.

SOLUTION: A group of people are holding signs.

PROBLEM: Sentence 1: A group of people wearing yellow shirts, with one woman wearing an orange tank top, biking on stationary bikes. Sentence 2: A group of people are on stationary bikes

SOLUTION: A group of people riding motorcycles down a hill.

PROBLEM: Sentence 1: There is a black and white dog chewing on a branch outside. Sentence 2: There is a dog chewing on a branch outside.

SOLUTION:
There is a black and white cat chewing on a branch outside.