Before revision:  Even though there are no prior approaches that are directly applicable to the UPL problem, we compare the STAM architecture to a couple of unsupervised and self-supervised deep learning approaches adapted in the UPL context.
After revision:  Even though there are no prior approaches that are directly applicable to the UPL problem, we compare the STAM architecture in comparison to some unsupervised and self-supervised deep learning approaches adapted in the UPL context.