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

Guessing-game dialogue about one of the objects:
q: is it in front?
a: Yes
q: is it sink?
a: No
q: is it sink?
a: No
q: is it pipe?
a: No
q: is it toilet?
a: Yes
q: is it left one?
a: No