This article demonstrates the power of Knowledge Graphs using a sampling of links that identify documents published to the EU's Data Visualisation Tool - Data & Indicators Web Site.
Example
Digital Economy and Society Index
The Digital Economy and Society Index (DESI) is a composite index that summarizes relevant indicators on Europe’s digital performance and tracks the evolution of EU Member States, across five main dimensions: Connectivity, Human Capital, Use of Internet, Integration of Digital Technology, Digital Public Services.
This page also leads you to a document about its underlying datasets, metadata, and query service endpoints.
I can engage the SPARQL Query Services Endpoint by executing the default query presented, which leads to a simple HTML-based Index Page where each hyperlink identifies a dataset.
By clicking on an item of interest, you are taken to a page about a given dataset that also supports faceted browsing for even deeper exploration of the underling Knowledge Graph -- informed by attributes that represent a variety of entity relationship types.
Conclusion
By fully embracing Knowledge Graphs, and their deployment using Linked Data principles, the EU has created a modern and effective Web Site that also functions as a combined source of Data, Information, and Knowledge that's highly discoverable and reusable by its visitors -- be it humans or machines.
Bearing in mind that this is a Virtuoso instance in action, all of the underlying data contextualized by the EU Knowledge Graph is also available to any application or service that supports HTTP, ODBC, JDBC, or ADO.NET as Data Access Protocols.