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: It looked dark outside while in the empty restaurant, a young guy dressed in black sat in a booth playing the harmonica. Sentence 2: A young man is playing the harmonica.

SOLUTION: A man with a harmonica in his pocket is walking down the street.

PROBLEM: Sentence 1: A girl hanging upside down on a rope over a grassy lawn above a city. Sentence 2: The girl is hanging upside down.

SOLUTION: The girl is standing by the rope.

PROBLEM: Sentence 1: A man diving with a snorkeling mask in his hand. Sentence 2: A man is holding a mask.

SOLUTION:
A man has both hands free.