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 man in ice climbing gear holds a rope. Sentence 2: A man is outside holding a rope.

SOLUTION: A woman and a shark go to the movies.

PROBLEM: Sentence 1: A woman running along a river along a path. Sentence 2: A human running.

SOLUTION: Nobody is running.

PROBLEM: Sentence 1: A black and a yellow dog Sentence 2: A dog.

SOLUTION:
The dog is white and black.