Wiktionary
He's a journalist.
Source: Tatoeba
He's a cook.
I am a cook.
He's a fisherman.
He's a fisher.
A policeman ran past.
She's a professor.
She is a professor.
She is a journalist.
I am an electrician.
He's an architect.
I need a lawyer.
I'm not a policeman.
I'm an engineer.
She's a programmer.
I am a university student.
I'm a college student.
I'm a university student.
I am a college student.
I am a student in a university.
I'm a student in a university.
Tom is a journalist.
He's a programmer.
I want to be a nurse.
He's a high school student.
My older brother is a teacher.
He pretended to be a doctor.