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