What is the {historical country} for {participant} of {Cuban Missile Crisis}
What nation taken an interest within the Cuban Rocket Crisis?
What country participated in the Cuban Missile Crisis?
SELECT DISTINCT ?r WHERE { ?r rdf:type ontology:historical_country . resource:Cuban_Missile_Crisis property:participant ?r }
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/Q3024240> } 
 select distinct ?obj where { wd:Q128160 wdt:P710 ?obj . ?obj wdt:P31 wd:Q3024240 } 
Soviet Union