Question: Which key perosn of the Elders is also the president of united World College ?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/The_Elders_(organization)> prop:keyPeople ?uri. <http://dbpedia.org/resource/United_World_Colleges> onto:president ?uri}