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: A blond-haired girl is putting on a bike helmet with a sticker that reads "cool cats" displayed on it. Sentence 2: The young girl is visiting her grandparents Virginia Beach, VA., and is enjoying a bike ride near the beach.

SOLUTION: There is one girl in this picture.

PROBLEM: Sentence 1: A crowded marketplace is filled with people, including women with their heads covered with veils. Sentence 2: An islamist marketplace is busy.

SOLUTION: The market is very busy.

PROBLEM: Sentence 1: A security guard stands by a metal, lighted sculpture. Sentence 2: A guard dog stands next to a sculpture with a security guard.

SOLUTION:
A person guards a sculpture.