What is the {political murder} for {significant event} of {Sirhan Sirhan}
What was Sirhan Sirhan's political murder?
What political murder involved Sirhan Sirhan?
SELECT DISTINCT ?x WHERE { resource:Sirhan_Sirhan property:significant_event ?x . ?x rdf:type ontology:political_murder }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q297112> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P793> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1139665> } 
 select distinct ?obj where { wd:Q297112 wdt:P793 ?obj . ?obj wdt:P31 wd:Q1139665 } 
assassination of Robert F. Kennedy