Question: What offices were held by the person who stated "Seriously, I do not think I fit for the presidency?"?
Answer(s):
answer: United States Representative
answer: Member of Illinois House of Representatives
answer: President of the United States

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:people.person.quotations ns:m.048jc3k . 
?c ns:government.politician.government_positions_held ?y .
?y ns:government.government_position_held.office_position_or_title ?x .
}