Question: How many factions have fought in wars where Francois Marie Le Marchand de Lignery was involved?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { <http://dbpedia.org/resource/François-Marie_Le_Marchand_de_Lignery> onto:battle ?x . ?x prop:combatant ?uri  . ?x rdf:type onto:MilitaryConflict}