Question: Who was the last spouse for Samuel Hahnemann in the year 1830?
Paraphrase: Samuel Hahnmann was married to who in 1830
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q157056 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1830')) }