What is the {empire} for {shares border with} of {Roman Empire}
What country bordered the Roman Empire?
 select distinct ?obj where { wd:Q2277 wdt:P47 ?obj . ?obj wdt:P31 wd:Q48349 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2277> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P47> . ?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/Q48349> } 
What nation flanked the Roman Empire?