Question: What is the Croesus death date which is earlier than Gregorian date?
Paraphrase: On which date which is earlier than Gregorian date did Croesus died?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q184462 p:P570 ?s . ?s ps:P570 ?obj . ?s pq:P31 wd:Q26961029 }