Question: Which Chess players died in the same place they were born in?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/> 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
SELECT DISTINCT ?uri 
WHERE { 
        ?uri rdf:type onto:ChessPlayer .  
        ?uri onto:birthPlace ?x .  
        ?uri onto:deathPlace ?y . 
        FILTER (?x = ?y) . 
}