Question: What scientist died on the date 1875-06-14 and was known for discovering Neptune?
Answer(s):
answer: Heinrich Louis d'Arrest

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0c31h)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0c31h ns:astronomy.astronomical_discovery.discoverer ?x .
?x ns:people.deceased_person.date_of_death "1875-06-14"^^xsd:dateTime . 
}