Question: Of the years in which the Steelers won the Super Bowl, which event ended the earliest?
Answer(s):
answer: Super Bowl IX

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.05tfm)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.05tfm ns:sports.sports_team.championships ?x .
?x ns:time.event.end_date ?num .
}
ORDER BY ?num LIMIT 1