what is the {replaced by} for {Ibn Saud} has {position held} as {King of Saudi Arabia} ?
When Ibn Saud steps down as King of Saudi Arabia, who will take over?
Who will replace Ibn Saud as King of Saudi Arabia?
SELECT ?o WHERE { ?j property:replaced_by ?o . resource:Ibn_Saud property:position_held ?j . ?j property:position_held resource:King_of_Saudi_Arabia }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q151509> .
?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/Q850168> .
?statement <http://www.wikidata.org/entity/P1366> ?value. 
} 

SELECT ?value WHERE { wd:Q151509 p:P39 ?s . ?s ps:P39 wd:Q850168 . ?s pq:P1366 ?value}