SELECT DISTINCT ?s
WHERE {
?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://umbel.org/umbel/rc/PersonWithOccupation>
?s <http://purl.org/dc/elements/1.1/description> American politician
MINUS {?s dbo:wikiPageRedirects ?o . }}
