Question: Who were fighting the war where the QF Hotchkiss was used?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { <http://dbpedia.org/resource/QF_6-pounder_Hotchkiss> onto:usedInWar ?x . ?x onto:territory ?uri  . ?x rdf:type onto:MilitaryConflict}