What is the {country} for {participant} of {North African Campaign}
What nation is the North African Campaign a portion of?
What country is the North African Campaign a part of?
SELECT DISTINCT ?y WHERE { resource:North_African_campaign property:participant ?y . ?y rdf:type ontology:country }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q218678> . ?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/Q6256> } 
 select distinct ?obj where { wd:Q218678 wdt:P710 ?obj . ?obj wdt:P31 wd:Q6256 } 
Australia Canada United States of America United Kingdom