Name the officeholder who hasa child named Augustus and has an associate named Marcus Bibulus ?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/associate> <http://dbpedia.org/resource/Marcus_Calpurnius_Bibulus> . ?uri <http://dbpedia.org/property/children> <http://dbpedia.org/resource/Augustus>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder>}
Marcus_Calpurnius_Bibulus Augustus