give me all federal chancellors of germany.
SELECT DISTINCT ?uri WHERE { ?uri a <http://dbpedia.org/ontology/Person> { ?uri <http://dbpedia.org/ontology/office> 'Chancellor of Germany' } UNION { ?uri <http://dbpedia.org/property/office> <http://dbpedia.org/resource/Chancellor_of_Germany> } }
Chancellor_of_Germany