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 neither agree nor 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 man preparing to repel down a mountain. Sentence 2: The man is ready to descend.

SOLUTION: The man gets ready to join his friends below.

PROBLEM: Sentence 1: A man with a weird bike watches a policeman and some skateboarders. Sentence 2: A man with a bike is watching the policeman.

SOLUTION: The policeman is arresting the skateboarders.

PROBLEM: Sentence 1: A person is sitting on a ledge by a river in a city. Sentence 2: A person by the river.

SOLUTION:
A person preparing to jump in the river.