Question: Which city do both Arthur Ross and Edward Niesen come from?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Arthur_A._Ross> <http://dbpedia.org/property/placeOfBirth> ?uri. <http://dbpedia.org/resource/Edward_Niesen> <http://dbpedia.org/ontology/birthPlace> ?uri}