TASK DEFINITION: In this task, you're given a pair of sentences, sentence 1 and sentence 2, that neither agree with nor contradict each other. Your job is to alter sentence 2 so that the pair clearly 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 man on the phone in an office setting. Sentence 2: The man is having a phone conference

SOLUTION: The man is inside

PROBLEM: Sentence 1: A person is driving an all-terrain vehicle through a muddy course. Sentence 2: persons first time in ATV

SOLUTION: person drives ATV

PROBLEM: Sentence 1: A young girl with a determined expression climbing a cliff edge. Sentence 2: A young girl is climbing a small cliff for charity.

SOLUTION:
A young girl climbs a cliff determinedly.