Question: What is the main spoken language in the country with national anthem Swiss Psalm?
Answer(s):
answer: Italian Language
answer: German Language
answer: French
answer: Romansh language

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:location.country.national_anthem ?k .
?k ns:government.national_anthem_of_a_country.anthem ns:m.01jhkt . 
?c ns:location.country.languages_spoken ?x .
}