Question: Which source of Water resources management in El Salvador is also the nation of the Sierra del Merendn?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Water_resources_management_in_El_Salvador> <http://dbpedia.org/property/sourceCountry> ?uri. <http://dbpedia.org/resource/Sierra_del_Merendón> <http://dbpedia.org/ontology/country> ?uri}
Answer: [Guatemala] is the source country of Water resources management in El Salvador and nation of the Sierra del Merendn.