What is {child} of {Joseph Stalin} and {date of birth}
Which date was the offspring of Joseph Stalin born and what was the name?
What is the name of offspring of Joseph Stalin and he born on which date?
SELECT ?j ?u WHERE { ?d property:child ?u . resource:Joseph_Stalin property:child ?d . ?d property:date_of_birth ?j . }
select distinct ?dataprop1 ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q855> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?statement <http://www.wikidata.org/entity/P580> ?dataprop1 . } 
SELECT ?value1 ?obj WHERE { wd:Q855 p:P40 ?s . ?s ps:P40 ?obj . ?s pq:P569 ?value1 . }