Question: How many contries surround the seas on the banks of which is the city of Cancun?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/cities> <http://dbpedia.org/resource/Cancún> . ?x <http://dbpedia.org/ontology/country> ?uri  . }
Answer: There are [20] countries surrounding the seas whose one city is Cancun.