Question: Who is the wife of the person that Congress dedicated its work?
Answer(s):
answer: Mary Todd Lincoln

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:people.person.spouse_s ?y .
?y ns:people.marriage.spouse ?x .
?x ns:people.person.gender ns:m.02zsn .
}