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 bellhop is pushing luggage around inside a hotel. Sentence 2: A person is moving suitcases around.

SOLUTION: The bellhop is outside smoking a cigarette.

PROBLEM: Sentence 1: A teenage boy is holding his skateboard. Sentence 2: A boy is posing with a skateboard.

SOLUTION: A boy is posing with a bicycle.

PROBLEM: Sentence 1: A gray dog runs along the green grass. Sentence 2: A dog is running in the grass

SOLUTION:
A black dogs chases a boy in the grass.