Question: Which offices were held by the politicians who held their allegiance to the union of american civil war?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x prop:allegiance <http://dbpedia.org/resource/Union_(American_Civil_War)> . ?x prop:office ?uri . ?x rdf:type onto:OfficeHolder}