Question: From how many different institutes have the members of Judge Advocate General's Corps graduated?
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 { ?x onto:militaryRank <http://dbpedia.org/resource/Judge_Advocate_General's_Corps,_United_States_Army> . ?x onto:almaMater ?uri  . ?uri rdf:type onto:EducationalInstitution}