Janet: Look, this is a picture of my family.
Kate: It's beautiful. Who's the lady?
Janet: She's my mother.
Kate: What's her job?
Janet: She's a dentist.
Kate: What does a dentist do?
Janet: When people have a tooth-ache, a dentist can help them.
Kate: Wow, your mother is great.
Janet: Yes. She likes her job very much, and most of the patients like her, too. They said she is a good dentist. She is my heroin.
Kate: Do you want to be a dentist when you grow up?
Janet: Yes, of course.