Question: In which city is the building, whose part is the Martin AN/FSG1 anti aircraft system?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:part <http://dbpedia.org/resource/Martin_AN/FSG-1_Antiaircraft_Defense_System> . ?x prop:district ?uri  . ?x rdf:type onto:Building}