Question: What is the nation of the speedway league where Ikaros Smederna played?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Ikaros_Smederna> onto:league ?x . ?x onto:country ?uri  . ?x rdf:type onto:SpeedwayLeague}