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: With flowers in the foreground, a man in a blue striped shirt bikes past a large white building. Sentence 2: A man riding his bike in front of buildings outside.

SOLUTION: A man walks in the countryside, picking up flowers from the side of the road.

PROBLEM: Sentence 1: A person wearing a hat and baggy pants is skateboarding on cement. Sentence 2: A human rides a skateboard.

SOLUTION: An old man falls off a skateboard.

PROBLEM: Sentence 1: A group of children are playing on swings. Sentence 2: The children are playing on swings.

SOLUTION:
A couple of children are playing on swings.