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 young child walks among fallen leaves. Sentence 2: A child walking through leaves.

SOLUTION: A young boy shovels snow.

PROBLEM: Sentence 1: A young girl wearing a tutu dances in a large room. Sentence 2: The  young girl is performing.

SOLUTION: The young girl is standing there.

PROBLEM: Sentence 1: A man plays a guitar in a common area. Sentence 2: There is a man.

SOLUTION:
The man is playing tetris.