Question: From how many different places did the weapons used in the American Indian wars originate?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x onto:usedInWar <http://dbpedia.org/resource/American_Indian_Wars> . ?x prop:origin ?uri . ?uri rdf:type onto:Place}