What is {date of death} of {Albert, Duke in Prussia} that is {instance of} is {statement with Gregorian date earlier than 1584} ?
When did Albert, Duke of Prussia die?
SELECT ?obj WHERE { wd:Q40433 p:P570 ?s . ?s ps:P570 ?obj . ?s pq:P31 wd:Q26961029 }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q40433> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P570> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q26961029>
} 

What was the period of death of the Prussian Duke Albert?