Question: Name the military units whose command structure's headquarters is The Pentagon?
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 { ?x prop:headquarters <http://dbpedia.org/resource/The_Pentagon> . ?uri onto:commandStructure ?x . ?uri rdf:type onto:MilitaryUnit}