That was my understanding just glancing at it. Attempt to surface the actual (apparently 500 of them) communities. Visualization forthcoming, could be interesting

Oh! I didn't realize! Though if no graphs are shown then isn't the data kind of meaningless? Like, what were the clustering parameters?

I'm used to dot arrays. So, no idea how this works. I'm assuming he used distance to collapse clusters of dots and then pulled out most-common follows or something.

This is the graph.