Question: Which television station created "Arthur" and produced "Crisis in Central America"?
Answer(s):
answer: WGBH

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0px0r)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0px0r ns:tv.tv_program.program_creator ?x .
?x ns:tv.tv_producer.tv_episodes_produced ?c .
?c ns:tv.tv_producer_episode_credit.episode ns:m.05v2gyc . 
}