Question: How many people have fought wars where Arthur St. Clair was a commander?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x onto:commander <http://dbpedia.org/resource/Arthur_St._Clair> . ?x prop:combatant ?uri  . }