Question: Who was in conflicts of Fort Barrancas and Gadsden?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/ontology/battle> <http://dbpedia.org/resource/Fort_Barrancas> . ?uri <http://dbpedia.org/ontology/battle> <http://dbpedia.org/resource/Fort_Gadsden> . }