Question: Which languages are used for communication in the nation whose national anthem is Bilady, Bilady, Bilady?
Answer(s):
answer: Siwi Language
answer: Modern Standard Arabic
answer: Egyptian Arabic
answer: Sa'idi Arabic
answer: Arabic, Sudanese Spoken Language
answer: Bedawi Arabic
answer: Nobiin Language
answer: Domari Language
answer: Arabic 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.0d9nj_ . 
?c ns:location.country.languages_spoken ?x .
}