It would be interesting to know how they've built out this ontology. I'm sure they seeded it with something that they acquired from some company that specializ

It would be interesting to know how they've built out this ontology. I'm sure they seeded it with something that they acquired from some company that specializes in this sort of thing. I think that's how they got in trouble a few years back because their initial one had subjects like "Nazi", etc., and you could buy ads targeting people interested in Nazis. I'm sure they've since gone through and methodically cleared out those sorts of subjects.