Question: How many scientist became famous for the battle of Occupation of Japan?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/battle> <http://dbpedia.org/resource/Occupation_of_Japan> . ?uri <http://dbpedia.org/property/knownFor> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Scientist>}