Question: Who was the political appointer, who had the title White House Staff Assistant, married to?
Answer(s):
answer: Pat Nixon

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:government.political_appointer.appointees ?k .
?k ns:government.government_position_held.office_position_or_title ns:m.05ywndm . 
?c ns:people.person.spouse_s ?y .
?y ns:people.marriage.spouse ?x .
?y ns:people.marriage.type_of_union ns:m.04ztj .
}