"<UNK>_0_<UNK>_0_0" label in semantic_labels.json

[harshm121]

The first element in semantic_labels.json. Does it correspond to any label?

[anassmu]

I guess it correspond to unknown labels, there's unknown and missed labels :)

[AqsaM1]

Hey does anyone know how to read the semantic_labels.json file for 2D images? @harshm121 @anassmu