Although she had to riff through a couple of very unfortunate slides quickly (identifying political affiliation of social network users is a classic task in relational learning, but the keynote came hot in the heels of the Cambridge Analytica scandal and her slides went down like a led baloon) it was a great keynote and one I was happy to see.
There's more work on combining relational, logic-based machine learning and statistical machine learning by Luc de Raedt, Kristian Kerstig and Stephen Muggleton, among many others in the Inductive Logic Programming community. There's some good pointers on this website for Lise Getoor's introductory book to the field:
* Lord Sauron's.
> A Short Introduction to Probabilistic Soft Logic
And a longer, more formal treatment of the same:
> Hinge-Loss Markov Random Fields
and Probabilistic Soft Logic