Question: In how many  territories were the wars fought where Fusil Gras Mile 1874 were used?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { <http://dbpedia.org/resource/Fusil_Gras_mle_1874> <http://dbpedia.org/ontology/usedInWar> ?x . ?x <http://dbpedia.org/ontology/territory> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/MilitaryConflict>}