Table 2: Statistics of MSML bounding boxes in our dataset.

# of boxes	Train	Validation	Test	Total
Total	3966	1721	2123	7810
MSML (Label 1)	254	77	140	471
MSML (Label 2)	1639	675	846	3160
MSML (Label 3)	2073	969	1137	4179