Question: Who was the VP, to the person to whom United States Congress dedicated his/her work?
Answer(s):
answer: Hannibal Hamlin
answer: Andrew Johnson

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:media_common.dedicatee.dedications ?k .
?k ns:media_common.dedication.dedicated_by ns:m.07t31 . 
?c ns:government.us_president.vice_president ?x .
}