Question: Which of Henry VIII's three children were buried before the 28th of April, 1603?
Answer(s):
answer: Mary I of England
answer: Edward VI of England

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.03p77)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.03p77 ns:people.person.children ?x .
?x ns:people.deceased_person.date_of_burial ?num .
FILTER (?num < "1603-04-28"^^xsd:dateTime) . 
}