What is {chairperson} of {International Skating Union} that is {replaced by} is {Ernst Labin} ?
Who replaced Ernst Labin as chair of the International Skating Union?
SELECT ?obj WHERE { wd:Q543115 p:P488 ?s . ?s ps:P488 ?obj . ?s pq:P1366 wd:Q3057355 }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q543115> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P488> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1366> <http://wikidata.dbpedia.org/resource/Q3057355>
} 

Ernst Labin, chair of the International Skating Union was replaced by whom?