Question about the experiments

[MobiusLqm]

Hi！ Thanks for your wonderful work. In your paper, it says:"Note that, the recent Semantic-NeRF (Zhi et al., 2021a) is also not comparable because it only learns 3D semantic categories, not individual 3D objects." I’m a little bit confused about why dont you directly use the instance masks to train the semantic-nerf the compare with your work?