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 man in a blue jacket smiles back at the camera, positioned in front of a lake or large river on a clear sunny day. Sentence 2: A man is posing for a picture outside.

SOLUTION: A man is snowboarding down a huge mountain.

PROBLEM: Sentence 1: A man playing scrabble with carrots, celery, onions, limes, apples and cauliflower in the pictures while his opponent has rocks spelled out on his tray. Sentence 2: Someone is playing scrabble.

SOLUTION: A man is playing tetris

PROBLEM: Sentence 1: A family is sitting on a curb while men in red and blue costumes walk by. Sentence 2: A family is sitting outside.

SOLUTION:
Men in red and blue costumes sit on a bench while families walk by.