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 large group of people are assembled in a large city. Sentence 2: The people are waiting for the mayor.

SOLUTION: The people are in the city.

PROBLEM: Sentence 1: A man wearing black and yellow shorts is standing on a wooden pole with his arms outstretched and his shirt pulled over his face. Sentence 2: Someone is climbing a pole.

SOLUTION: Someone is outside.

PROBLEM: Sentence 1: Two policemen in yellow and black uniforms are riding bikes. Sentence 2: The policemen are wearing vests.

SOLUTION:
Policemen riding bikes.