Let’s play with Wikidata (query.wikidata.org) Return 20 items which are instance of human which have a twitter account: SELECT ?item ?twitter WHERE { ?item wdt:P31 wd:Q5 . ?item wdt:P2002 ?twitter . } LIMIT 20 Or all Nobel Peace laureates:
Wikidata
Wikidata
Wikidata is the Wikipedia project for structured knowledge. For example it knows that the capital of Spain is Madrid. The ruby gem wikidata has a basic support to retrieve it:
Hector Perez Arenas 