It appears to only extract structured data from Wikipedia, not natural language, so it is kind of basic then.
DBpedia is a project aimed at extracting structured content from the information created in Wikipedia and making it available on the web in a machine-readable format. By converting Wikipedia's unstructured content into a structured format, DBpedia enables users to query the information using standard semantic web technologies, such as RDF (Resource Description Framework) and SPARQL (an RDF query language).
New to topics? Read the docs here!