Question: Who is the stock holder of the bank where  Peter Grauer works  ?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Peter_Grauer> <http://dbpedia.org/property/occupation> ?x . ?x <http://dbpedia.org/property/owner> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Bank>}