Question: Give me the mascot of the military unit in which Stewart Bovell served?
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 { <http://dbpedia.org/resource/Stewart_Bovell> onto:militaryBranch ?x . ?x prop:mascot ?uri  . ?x rdf:type onto:MilitaryUnit}