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 man is helping another man after a fall on the street. Sentence 2: The man is behind a good samaritan by helping another man.
The man never fell.

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: Two females are wearing bikini tops and very short shorts while walking down the street. Sentence 2: Two females walking side by side down a street outdoors.

The two females are wearing sweaters.