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.

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

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.
Motorcycle riders are stopped and drinking some coffee.

Sentence 1: An Asian man wearing a dark tank top t-shirt is in the marketplace. Sentence 2: A man is wearing a dark colored top.

A woman is wearing a dark tank top.