Question: What countries have and ISO numberic code of less than 604 and have Spanish as their primary language?
Answer(s):
answer: Honduras
answer: Colombia
answer: Equatorial Guinea
answer: El Salvador
answer: Panama
answer: Cuba
answer: Costa Rica
answer: Guatemala
answer: Chile
answer: Paraguay
answer: Dominican Republic
answer: Bolivia
answer: Nicaragua
answer: Argentina
answer: Ecuador

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.06nm1)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.06nm1 ns:language.human_language.countries_spoken_in ?x .
?x ns:location.country.official_language ns:m.06nm1 .
?x ns:location.country.iso_numeric ?num .
FILTER (xsd:integer(?num) < 604) . 
}