What nation is the motherland of Ricardo Alfonso Cerna  where Apostolic Vicariate of El Petn is located?
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Ricardo_Alfonso_Cerna> <http://dbpedia.org/property/birthPlace> ?uri. <http://dbpedia.org/resource/Apostolic_Vicariate_of_El_Petén> <http://dbpedia.org/ontology/country> ?uri . }
Ricardo_Alfonso_Cerna Apostolic_Vicariate_of_El_Petén