I'm suprised no difference between american and european metal was found. I feel like they are quite different, but it seems this is not supported by this data.

I'm suprised no difference between american and european metal was found. I feel like they are quite different, but it seems this is not supported by this data. I found it amusing that Venom and Running Wild are grouped together in the first step. But well, by the lyrics it fits. The rest matches my expectations surprisingly well.