Question: What is the nationality of the chancellor who was served by Michael Mayr?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Michael_Mayr> <http://dbpedia.org/ontology/deputy> ?x . ?x <http://dbpedia.org/ontology/nationality> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Chancellor>}