Is it a pen?
Yes
What is it?
It is a book
What is it?
It is a rubber.
Is it a bookcase
Yes
What is it?
It is a ruler
Is it a rubber?
No
What is it?
It is a pencil.
What is it?
It is a door.
What is it?
It is a bookcase.
What is it?
It is a window
What is it?
It is a pen.
What is it?
It is a folder.
Is it a window?
No
What is it?
It is a bag