Question: Give me the total number of commander of the military conflicts whose commander is Roundhead (Wyandot).
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:commander <http://dbpedia.org/resource/Roundhead_(Wyandot)> . ?x onto:commander ?uri }