Question: In how many different places have ehtics philosophers died?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/mainInterests> <http://dbpedia.org/resource/Ethics> . ?x <http://dbpedia.org/property/placeOfDeath> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Place>}