Who are they?
They're office workers.
Are they pilots?
No, they aren't. They're students.
Who are they?
They're engineers.
Who are they?
They're salesclerks.
Are they salesclerks?
Yes, they are.
Who are they?
They're pilots.
Are they students?
Yes, they are.
Are they students?
No, they aren't. They're firefighters.
Who are they?
They're students.
Are they engineers?
Yes, they are.
Who are they?
They're dentists.
Who are they?
They're dentists.
Who are they?
They're teachers.
Are they dentists?
No, they aren't. They're teachers.