Question: Which senator served in military units VMF-155 and VMF-218?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?uri onto:militaryUnit <http://dbpedia.org/resource/VMF-155> . ?uri onto:militaryUnit <http://dbpedia.org/resource/VMF-218> . ?uri rdf:type onto:Senator}