What is {date of birth} of {Xenophon} that is {instance of} is {statement with Gregorian date earlier than 1584} ?
What was Xenophon's birthday before the Gregorian calendar?
What was the pre-Gregorian calendar birth date of Xenophon?
SELECT ?y WHERE { ?c property:date_of_birth ?y . ?c rdf:type ontology:statement_with_Gregorian_date_earlier_than_1584 . resource:Xenophon property:date_of_birth ?c }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q129772> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P569> .
?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>
} 

SELECT ?obj WHERE { wd:Q129772 p:P569 ?s . ?s ps:P569 ?obj . ?s pq:P31 wd:Q26961029 }