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: Three men in a fishing boat on a river in Africa. Sentence 2: fishing boat on africian river

SOLUTION: three men swimming in river

PROBLEM: Sentence 1: A person in a dark outfit is walking down a stairwell which contains a shadow of an object. Sentence 2: Wearing dark clothes, the person walked down the stairs.

SOLUTION: The man ran up the stairs, all the while not knowing whom he was chasing, although floodlights brightly lighted the stairwell.

PROBLEM: Sentence 1: A man is sleeping on the sidewalk, on top of a box. Sentence 2: a homeless man sleeps on top of a cardboard box

SOLUTION:
A homeless man is begging for change by the sidewalk