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

Guessing-game dialogue about one of the objects:
q: a person?
a: Yes
q: in the crowd?
a: Yes
q: in blue?
a: No
q: in red?
a: No
q: in white?
a: Yes
q: left side?
a: Yes
q: facing the crowd?
a: No
q: with a hat?
a: No
q: the extreme left one?
a: No
q: the 2?
a: Yes
q: do they have a red spot on their t-shirt?
a: Yes