Superpixel Label: Windows, Mirrors and Fences
Each Superpixel can only be painted and labeled once. This can be tricky for "see-through" and "reflective" objects like fences, mirrors and windows.
The rule is: label each object what it is. This means label windows as Window, and label mirrors as Mirror. Do not label what is shown through the window or reflected in the mirror.
However, if a Five has already begun painting and labeling what is shown through or reflected, it is fine to continue doing so.