Question: What is a fun thing to do in Philadelphia that is reoccurring since 1954?
Answer(s):
answer: Philadelphia Marathon

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:time.recurring_event.date_of_first_occurance "1954"^^xsd:dateTime . 
}