Question: What structure on which construction began in 1938 was designed by Albert Speer?
Answer(s):
answer: Reich Chancellery

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0l4t)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0l4t ns:architecture.architect.structures_designed ?x .
?x ns:architecture.structure.construction_started "1938"^^xsd:dateTime . 
}