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 smiling construction worker with a white helmet. Sentence 2: He has been hit on the head before

SOLUTION: His head is protected

PROBLEM: Sentence 1: Two men wearing hats are standing on the path beside a brick building. Sentence 2: Two men know each other.

SOLUTION: Two men with hats are standing outside.

PROBLEM: Sentence 1: Two baseball players warming up. Sentence 2: Baseball players begin warming up their car.

SOLUTION:
Baseball players begin prep work.