instruction:
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.
question:
Sentence 1: A man wearing headphones is checking the screen of a handheld device while on the street. Sentence 2: Sue was looking at her ipad.
answer:
Bob was wearing his headphones and checking his ipod while walking.


question:
Sentence 1: A man kneeling on a roof touching a piece of plywood wearing sunglasses. Sentence 2: A man kneeling on a roof is fixing a spot on the roof with a piece of plywood.
answer:
A man wearing sunglasses is kneeling on the top of a house.


question:
Sentence 1: A very very wide roller coaster trundles down the track. Sentence 2: A roller coaster is out of control.
answer:

A roller coaster rolls on its track.