Question: Who was Louis XVI that held the position form 6-2-1952?
Answer(s):
answer: Duke of Normandy
answer: Duke of Normandy

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0dj9w)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0dj9w ns:royalty.noble_person.titles ?y .
?y ns:royalty.noble_title_tenure.noble_title ?x .
?x ns:government.government_office_or_title.office_holders ?c .
?c ns:government.government_position_held.from "1952-02-06"^^xsd:dateTime . 
}