Question: What is there to visit in Venice where the structure construction started in 1748?
Answer(s):
answer: Palazzo Grassi

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07_pf)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07_pf ns:travel.travel_destination.tourist_attractions ?x .
?x ns:architecture.structure.construction_started "1748"^^xsd:dateTime . 
}