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 large white dog growling at a large black dog. Sentence 2: A white dog is retaliating at a black dog's growl.
Two dogs are interacting with each other.

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: Woman reaching new heights. Sentence 2: Aggressive woman reaching new heights.

A person reaching new heights.