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 guy wearing a black shirt and a red hat riding his skateboard. Sentence 2: A guy is riding a skateboard.

SOLUTION: A guy is riding a scooter.

PROBLEM: Sentence 1: A black man with a green cap. Sentence 2: A man wears a cap.

SOLUTION: The man has a red hat on.

PROBLEM: Sentence 1: several people look on as gymnasts try to stick their routines. Sentence 2: Several people Watch gymnasts.

SOLUTION:
Several people are watching a football game.