Question: Give me the capitals of all countries in Africa.
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/> PREFIX yago: <http://dbpedia.org/class/yago/> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT ?uri ?string WHERE { ?states rdf:type yago:AfricanCountries . ?states onto:capital ?uri . OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') } }