Question: What organization with a founding date before April 4, 1925 was Hitler the leader of?
Answer(s):
answer: Sturmabteilung

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07_m9_)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07_m9_ ns:organization.organization_founder.organizations_founded ?x .
?x ns:organization.organization.date_founded ?num .
FILTER (?num < "1925-04-04"^^xsd:dateTime) . 
}