show me everyone who was born on halloween.
SELECT DISTINCT ?uri WHERE { ?uri a <http://dbpedia.org/ontology/Person> { ?uri <http://dbpedia.org/ontology/birthDate> ?date } UNION { ?uri <http://dbpedia.org/property/birthDate> ?date } <http://dbpedia.org/resource/Halloween> <http://dbpedia.org/property/date> ?date }
Halloween