Question: Which officers fought in the war of Siege of Fort Recovery?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/battle> <http://dbpedia.org/resource/Siege_of_Fort_Recovery>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder>}