What is the {democratic republic} for {participant} of {Cuban Missile Crisis}
What nations taken part within the Cuban Rocket Crisis?
What countries participated in the Cuban Missile Crisis?
SELECT DISTINCT ?q WHERE { resource:Cuban_Missile_Crisis property:participant ?q . ?q rdf:type ontology:democratic_republic }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q128160> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P710> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5255892> } 
 select distinct ?obj where { wd:Q128160 wdt:P710 ?obj . ?obj wdt:P31 wd:Q5255892 } 
United States of America