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 a gray shirt seasons meat on a grill. Sentence 2: The man is cooking a steak.
A man is seasoning meat on a grill

Sentence 1: A pit crew working on a race car. Sentence 2: They are changing tires.
People are working on a car.

Sentence 1: White-haired man in black hat and coat sitting against brick wall. Sentence 2: A homeless man sitting near a wall.

An aging man dressed in black sitting near a wall.