Question: What is the nationality of the J. T. Krogh which is also the sovereign state of the Camilla Martin?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/J._T._Krogh> <http://dbpedia.org/ontology/nationality> ?uri. <http://dbpedia.org/resource/Camilla_Martin> <http://dbpedia.org/ontology/country> ?uri}
Answer: [Denmark] is the nationality of J. T. Krogh and the sovereign state of Camilla Martin.