Question: Who was Secretary of State when the subject of the movie "Frost/Nixon" was the president?
Answer(s):
answer: William P. Rogers
answer: Henry Kissinger

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:film.film_subject.films ns:m.02vqsll . 
?c ns:government.political_appointer.appointees ?y .
?y ns:government.government_position_held.office_holder ?x .
?y ns:government.government_position_held.basic_title ns:m.0789n .
}