Who is this?
builder
Are they pupils?
Yes, they are.
Who is this?
waiter
Who is this?
teacher
Are they pupils?
No, they aren't.
Who is this?
vet
Are they builders?
Yes, they are.
Are they waiters?
No, they aren't.
Who are they?
builders
Who are they?
Waiters
Are they vets?
Yes, they are.
Who are they?
vets
Are they teachers?
No, they aren't.
Who is this?
pupil