Si yo tuviera que ponerle fichas a algo, se las pondria a la Dbpedia:
Project Overview
Wikipedia is the by far largest publicly available encyclopedia on the Web. Wikipedia editions are available in over 250 languages with the English one accounting for more than 2.18 million articles. Unfortunately, Wikipedia’s search capabilities are limited to full-text search, which allows very limited access to this valuable knowledge-base.
Semantic Web technologies enable expressive queries against structured and interlinked information on the Web. Unfortunately, there is not much RDF data online yet, and up-to-date terms and ontologies are missing for many application domains.
The DBpedia project helps resolve both issues by extracting structured information from Wikipedia and by making this information available on the Web.
The DBpedia data set currently provides information about more than 2.18 million “things”, including at least 80,000 persons, 293,000 places, 62,000 music albums, and 36,000 films. Altogether, the DBpedia data set consists of 218 million pieces of information (RDF triples).