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: three men in brown shorts are walking on rocks beside a river. Sentence 2: Three men are hiking.

SOLUTION: Some men walking on rocks.

PROBLEM: Sentence 1: A father and his son bonding. Sentence 2: A father and his son are playing catch.

SOLUTION: A man has a son.

PROBLEM: Sentence 1: A man playing a guitar on stage under red light. Sentence 2: A man playing a guitar for a performance at a show.

SOLUTION:
The man is performing with a guitar.