Question: Show me everyone who was born on Halloween.
SPARQL:
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?uri
WHERE {
        ?uri rdf:type dbo:Person .
      { ?uri dbo:birthDate ?date . }
      UNION
      { ?uri dbp:birthDate ?date . }
        res:Halloween dbp:date ?date . 
}