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 gray "labradoodle" jumps over another large dog. Sentence 2: A "labradoodle" jumps over another large dog.

SOLUTION: A blue "labradoodle" jumps over another large dog.

PROBLEM: Sentence 1: A man in a red helmet rollerblades near the beach with two dogs on a leash. Sentence 2: There are rollerbladers on the beach.

SOLUTION: A jogger is running with his two dogs.

PROBLEM: Sentence 1: Girls do martial arts on a red mat. Sentence 2: Girls participate in marital arts.

SOLUTION:
Girls take swimming lessons.