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 man riding a green motorcycle jumping nine other green motorcycles. Sentence 2: A man crashed while jumping over obstacles on his motorcycle.

SOLUTION: A man is performing tricks on his powerfile bike.

PROBLEM: Sentence 1: A man in a blue shirt, jeans, and wearing a tool belt is climbing down a metal rod. Sentence 2: A person is at work.

SOLUTION: A person is high off the ground.

PROBLEM: Sentence 1: Three firemen holding onto ropes from above. Sentence 2: The firemen are helping someone to safety.

SOLUTION:
The firemen are working with the ropes.