Question: What position did Arthur Balfour hold when he replaced Edward Grey, 1st Viscount Grey of Fallodon?
Paraphrase: What position did Arthur Balfour take over from Edward Grey, 1st Viscount Grey of Fallodon?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q19008 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P1365 wd:Q335187 }