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: There is a shirtless toned white man standing on a balcony of a construction site and holding some sort of tool. Sentence 2: A shirtless man is working construction.

SOLUTION: The shirtless toned man is black.

PROBLEM: Sentence 1: A white dog runs on the grass. Sentence 2: A white animal is outdoors.

SOLUTION: A black cat sits in the hedges.

PROBLEM: Sentence 1: A young boy with dark hair and skin leaning out of a window of a white bus with green and orange stripes. Sentence 2: There's a person on a vehicle.

SOLUTION:
The boy was on foot.