Objects in the image:
category: toilet
category: toothbrush
category: sink

Guessing-game dialogue about one of the objects:
q: Is it white ceramic?
a: Yes
q: Is it the bath tub?
a: No
q: Is it any part of the tub?
a: No
q: Is it the pedestal sink?
a: No
q: Is it part of the commode?
a: No
q: Is it the whole commode?
a: No
q: Is it part of the commode?
a: No
q: Is it white ceramic?
a: Yes
q: Is it the bathtub?
a: No
q: Moving from left to right across the picture, is it the sink?
a: No
q: Is it the commode?
a: No
q: is it part of the commode?
a: No
q: Is it the ceramic tiles on the bathroom floor?
a: No
q: is it the john?
a: Yes
q: Is it just part of the john/commode?
a: N/A
q: Is it on sitting on the top of the john?
a: No
q: Is it the lid of the john?
a: Yes
q: So, it is only the white ceramic piece that sits on top of the water tank of the john?
a: Yes
q: Is this piece not sitting straight on the tank?
a: Yes