Flask's flexibility made it the ideal choice of a web framework to develop a semantic graph-based application. Specifically, being able to "hook up" a custom data back-end without breaking a sweat clinched the deal. The application in question that I would like to talk about is Contextualise (www.contextualise.dev/), a (personal) knowledge management application. Contextualise is an open-source project: github.com/brettkromkamp/contextualise