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 man with gray hair accepts coins in front of a kiosk that has a multitude of fine colored powders in large bowls on display. Sentence 2: A man has gray hair.

SOLUTION: A man has white hair.

PROBLEM: Sentence 1: People are standing outside of a building. Sentence 2: The building had people near it.

SOLUTION: The people were all in the courtroom.

PROBLEM: Sentence 1: A crowd of people, some with white faces, walk through a hallway while carrying photos and crosses. Sentence 2: A crowd of people are walking while holding crosses

SOLUTION:
Nobody is in the hallway.