Objects in the image:
category: traffic light
category: person
category: backpack
category: person
category: person

Guessing-game dialogue about one of the objects:
q: red or green light?
a: No
q: person ??
a: No
q: the thing made of iron?
a: No
q: green ??
a: No
q: person holding or wearing?
a: Yes
q: black bag on blue person?
a: Yes