Question: Which country located in the Balkan peninsula, that has a religious organization leadership, since April of 1966?
Answer(s):
answer: Albania

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01jjk)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01jjk ns:location.location.contains ?x .
?x ns:base.biblioness.bibs_location.loc_type ?sk0 .
FILTER (str(?sk0) = "Country")
?x ns:religion.religious_leadership_jurisdiction.leader ?c .
?c ns:religion.religious_organization_leadership.start_date "1966-04"^^xsd:dateTime . 
}