RDF took Prolog clauses, restricted them to triplets, and made their representation dramatically more verbose. Then it removed the reasoning engine part of logic programming and replaced it with OWL which is by default computationally intractable.

I have tried for many, many years to learn to appreciate RDF and semantic technologies in general, but everytime I get involved it screams of a problem desperately looking for a solution, and whose general case of the problem (reasoning about relations) was already solved better decades ago (and with the recent revived interested in logic/relational programming seems likely to improve soon).

If you want to represent a graph structure in your data why not sets of json objects? Sure you end up with an ad hoc vocabulary, but I've never seen a successful project make use of the RDF ideal of massively shared vocabularies.