Did {Augustus} {sibling} {Agrippina the Elder} and {Octavia the Elder} ?
Were Agrippina the Elder and Octavia the Elder siblings of Augustus?
ASK WHERE { wd:Q1405 wdt:P3373 wd:Q229413 . wd:Q1405 wdt:P3373 wd:Q517380 }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1405> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q229413>. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1405> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q517380>. } 
Is it true that Agrippina the Elder and Octavia the Elder were siblings of Augustus?