Are there chairs in the room?
Yes
What is this?
window
Is there a sofa in the room?
No
Is there a Clock in the room?
No
What is this?
Computer
Is there a window in the room?
Yes
What is this?
Sofa
What is this?
Chair
What is this?
Table
Is there a table in the room?
Yes
What is this?
Clock
Is there a computer in the room?
Yes
What is this?
Door
What is this?
Bed