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: Individuals are building a house. Sentence 2: People are building a house.

SOLUTION: A construction crew is demolishing a house.

PROBLEM: Sentence 1: A man in a brown shirt is cooking in a room with blue paint. Sentence 2: The man is making food.

SOLUTION: The man is in a yellow room.

PROBLEM: Sentence 1: one of the guys have his mouth open Sentence 2: That guy has his mouth open.

SOLUTION:
The guy has a tightly shut mouth.