SELECT DISTINCT ?s
WHERE {
?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person>
?s <http://dbpedia.org/property/dateOfDeath> ?o1
FILTER regex (?o1, "1968")
MINUS {?s dbo:wikiPageRedirects ?o . }}
