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 person rappels off a cliff face. Sentence 2: Someone is climbing on a cliff.

SOLUTION: A hot air balloon crashes into the ground.

PROBLEM: Sentence 1: Two white guys are playing video games in their dorm. Sentence 2: Two guys playing games at college.

SOLUTION: The two black guys are playing video games at a store.

PROBLEM: Sentence 1: A bridesmaid is toasting at a wedding. Sentence 2: A woman is giving a speech.

SOLUTION:
A woman is swimming.