Question: Which ancient country had capital as Nicomedia and History of Trier?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/capital> <http://dbpedia.org/resource/Nicomedia> . ?uri <http://dbpedia.org/ontology/capital> <http://dbpedia.org/resource/History_of_Trier> . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Country>}
Answer: The country with capitals Nicomedia and History of Trier is [Roman Empire].