What is {spouse} of {Hugo Grotius} and {date of birth}
Who is the spouse of Hugo Grotius, and when was she born ?
Who is the wife of Hugo Grotius, and when was she born ?
SELECT ?r ?v WHERE { ?s property:date_of_birth ?r . . ?s property:spouse ?v . resource:Hugo_Grotius property:spouse ?s }
select distinct ?dataprop1 ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q154959> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> . ?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:Q154959 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P569 ?value1 . }