class [dog]                        |  class[cat]                        |  class[foo] ...
image=17, score=0.98, bbox=[...]   |  image=41, score=0.75, bbox=[...]  |  ...
image=33, score=0.60, bbox=[...]*  |  image=07, score=0.45, bbox=[...]  |  ...
image=93, score=0.55, bbox=[...]   |  image=33, score=0.40, bbox=[...]* |  ...
...                                |  ...                               |...