Question: What government office was held by Constantine XI Palaiologos and which is also the office for which Caesar Augustus is known?
Answer(s):
answer: Roman emperor

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0ngg)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0ngg ns:people.person.profession ?x .
?x ns:government.government_office_category.officeholders ?c .
?c ns:government.government_position_held.office_holder ns:m.0h7qj . 
}