Objects in the image:
category: motorcycle
category: backpack
category: backpack

Guessing-game dialogue about one of the objects:
q: is it text?
a: No
q: is it all or mainly metal?
a: No
q: is it wood?
a: No
q: is it glass?
a: No
q: does it mainly include the street?
a: No
q: is it mainly the sidewalk?
a: No
q: is it vegetation?
a: No
q: is it on the bike?
a: Yes
q: is it the blueish bag thing on top?
a: Yes
q: does it have letters on it?
a: No
q: Is it obstructed by rear-view mirror?
a: Yes
q: Does it include the bigger part of the bag?
a: Yes