Question: What language is share by the Irish people and the denizens of the fictional universe Buffyverse?
Answer(s):
answer: English Language

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.03bkbh)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.03bkbh ns:people.ethnicity.languages_spoken ?x .
?x ns:fictional_universe.fictional_language.found_in_fictional_universe ns:m.02s3gw . 
}