What is the {empire} for {time period} of {ancient Rome}
What is the period of time for the old Roman Empire?
What is the time period for the ancient Roman Empire?
SELECT DISTINCT ?r WHERE { ?r rdf:type ontology:empire . ?r property:time_period resource:Ancient_Rome }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2348> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q1747689> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q48349> } 
 select distinct ?sbj where { ?sbj wdt:P2348 wd:Q1747689 . ?sbj wdt:P31 wd:Q48349 } 