Question: Martin AN/GSG-5 is a part of the building in which city?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/part> <http://dbpedia.org/resource/Martin_AN/GSG-5_Battery_Integration_and_Radar_Display_Equipment> . ?x <http://dbpedia.org/property/district> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Building>}