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 woman is wearing a dust mask on her mouth whilst walking in the street. Sentence 2: There is a woman walking in the street

SOLUTION: There is a woman walking on the sidewalk

PROBLEM: Sentence 1: A group of turbaned men ride motorbikes away from the viewer down a tree edged street while a white van follows them. Sentence 2: A group of men ride motorbikes as a van follows them.

SOLUTION: Motorcycle riders are stopped and drinking some coffee.

PROBLEM: Sentence 1: A brown dog chews on an orange ball. Sentence 2: A dog chews on a ball.

SOLUTION:
A cat rolls in the grass.