Question: What three colleges did Robert F. Kennedy attend, and the organization founding date is before 1855-03-16?
Answer(s):
answer: Harvard College
answer: University of Virginia
answer: Milton Academy
answer: Harvard University
answer: University of Virginia School of Law

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.06hx2)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.06hx2 ns:people.person.education ?y .
?y ns:education.education.institution ?x .
?x ns:organization.organization.date_founded ?num .
FILTER (?num < "1855-03-16"^^xsd:dateTime) . 
}