what is the {replaces} for {Donald Rumsfeld} has {position held} as {White House Chief of Staff} ?
Who replaced Donald Rumsfeld as White House Chief of Staff?
SELECT ?value WHERE { wd:Q184650 p:P39 ?s . ?s ps:P39 wd:Q786242 . ?s pq:P1365 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q184650> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q786242> .
?statement <http://www.wikidata.org/entity/P1365> ?value. 
} 

When Donald Rumsfeld left the position of White House Chief of Staff, who took his place?