Question: What person who passed away before 21 October 2013 was the first president of the AFL?
Answer(s):
answer: Lamar Hunt

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0ysy)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0ysy ns:organization.organization.founders ?x .
?x ns:people.deceased_person.date_of_death ?num .
FILTER (?num < "2013-10-21"^^xsd:dateTime) . 
}