Question: Name the commanders of military conflicts where Roundhead was one of the commander ?
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:commander <http://dbpedia.org/resource/Roundhead_(Wyandot)> . ?x onto:commander ?uri  . ?x rdf:type onto:MilitaryConflict}