Who are they?
They are teacher
Are they pupils?
Yes, they are
Are they teachers?
Yes they are
Who are they?
They are vets
Who are they?
They are pupils
Are they builders?
Yes they are
Who are they?
They are waiters
Are they waiters?
No they aren't
Are they vets?
No, they aren't
Who are they?
They are builders
Are they builders ?
No, they aren't