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Domain-specific knowledge graphs have emerged as a field unto their own, steadily and perhaps not so slowly. Graphs have been pervasive in AI for a long period of time, dating back to the earliest eras in the field, but automatically representing large quantities of data as graphs is a relatively modern invention. With the advent of the Web, and the need for smarter search engines, both Google and (over a decade later) the Google Knowledge Graph were born. The Google Knowledge Graph has changed the way we interact with search engines, even though we often do not realize it. For example, it is not uncommon anymore for users to not click on a single link when they are searching for something; generally, the search engine itself is able to provide the solution for the problem the user seems to be facing. Organic integration of the traditional search engine with images, news, and videos has only added an …