Question: List few authors whose education took place in Saint Petersburg ?   
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri onto:education <http://dbpedia.org/resource/Saint_Petersburg>  . ?uri rdf:type onto:Writer}