Question: Solon Spencer Beman has architected in how many cities?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/architect> <http://dbpedia.org/resource/Solon_Spencer_Beman> . ?x <http://dbpedia.org/property/locationTown> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/City>}