Question: What position did F.W. de Klerk replace Alwyn Schelbusch as?
Paraphrase: Which job did F.W. de Klerk take over from Alwyn Schelbusch?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q151813 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P1365 wd:Q449929 }