instruction:
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.
question:
Sentence 1: A man with a shaved head and a button-up shirt looks into a microscope near a poster about red blood cells. Sentence 2: A scientist studies a vaccine.
answer:
A man without hair near a poster about red blood cells is looking through a microscope.

question:
Sentence 1: There is a man on the phone in an office setting. Sentence 2: The man is having a phone conference
answer:
The man is inside

question:
Sentence 1: A girl in a dress walks while a family stands in the background. Sentence 2: The girl is sad.
answer:
The girl walks close to her family.