Objects in the image:
category: person
category: horse
category: person
category: car
category: person
category: person
category: person
category: horse
category: horse
category: person
category: person
category: horse
category: horse
category: person

Guessing-game dialogue about one of the objects:
q: horse ??
a: No
q: one of the 4 riders?
a: No
q: one of the people at the back right?
a: No
q: the wooden pole?
a: No
q: horse saddle?
a: No
q: grass ??
a: No
q: something on one of the horses?
a: No
q: cars at the back?
a: Yes
q: one furthest to the right?
a: No
q: one just behind the 3rd rider from the left?
a: Yes