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: A child is attempting a jump trick on his skateboard while another films it from a low angle. Sentence 2: They will upload the video to youtube.

SOLUTION: The child is being active.

PROBLEM: Sentence 1: A man is enjoying a bottled beverage as he walks down the street. Sentence 2: A man was drinking a beer walking down the street.

SOLUTION: The man is walking down the street.

PROBLEM: Sentence 1: A large tan dog sits on a grassy hill. Sentence 2: The dog has lost it's human.

SOLUTION:
a large dog sits with grass around it