Question: What is the nickname of the club managed by Piotr baron?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:manager res:Piotr_Baron . ?x prop:nickname ?uri  . }