Question: What tributary of Kiel Canal is located at the following coordinates: 54.173891666667, 9.4427416666667?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q144825 p:P974 ?s . ?s ps:P974 ?obj . ?s pq:P625 ?x filter(contains(?x,'54.173891666667 9.4427416666667')) }