Question: What year did the man who spoke about Bimetallism run for president?
Answer(s):
answer: 1896 Democratic National Convention
answer: 1908 Democratic National Convention
answer: 1900 Democratic National Convention

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:event.public_speaker.speeches_or_presentations ?k .
?k ns:event.speech_or_presentation.speech_topic ns:m.01t25s . 
?c ns:base.politicalconventions.presidential_nominee.nominated_at ?x .
}