Question: Of all the fin things to do in Philadelphia, which organization had the earliest founding date?
Answer(s):
answer: Barnes Foundation

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0dclg)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0dclg ns:travel.travel_destination.tourist_attractions ?x .
?x ns:organization.organization.date_founded ?num .
}
ORDER BY ?num LIMIT 1