Question: Name the empire that was replaced by the Principality of Serbia that starts with letter E
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q48349 . ?sbj wdt:P1366 wd:Q684030 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'e')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25