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.

Sentence 1: A man in white dumping carts into the dumpster. Sentence 2: A man dumps out the trash he cleaned out of his garage.
Man putting carts in dumpster.

Sentence 1: Cobblestone street and line of storefronts Sentence 2: There are people walking down the street.
There are stores along a street.

Sentence 1: A man rides a bicycle over a dirt ramp. Sentence 2: A man with a helmet on is riding a bike over a ramp.

A man is riding a bicycle.