Objects in the image:
category: bus
category: bicycle
category: car
category: person
category: car
category: person
category: car
category: car
category: car
category: bus
category: car
category: train
category: car
category: bicycle
category: car

Guessing-game dialogue about one of the objects:
q: Is it difficult to guess?
a: Yes
q: Okay, let's split the picture into 4 quadrants. Is it in the top left area?
a: Yes
q: Is it a building or part of a building?
a: No
q: Is it part of that bridge thing?
a: No
q: Is it a lamppost?
a: No
q: Is it a vehicle?
a: Yes
q: Is it the blue truck in the background?
a: No
q: Is that last guess close to where it is?
a: No
q: Is it in the parking area?
a: Yes
q: Crap. Is it red?
a: No
q: Is it white?
a: Yes
q: I see a white car next to a red car in the parking area very close to the middle of the screen. Is that it?
a: Yes