Question: Which military unit's  garrison is Pentagon and command structure is United States Department of Defense?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri prop:garrison <http://dbpedia.org/resource/The_Pentagon> . ?uri onto:commandStructure <http://dbpedia.org/resource/United_States_Department_of_Defense>  . ?uri rdf:type onto:MilitaryUnit}