Question: Who was elected rector of Leipzig University on December 2, 1409?
Paraphrase: Who was chosen minister of Leipzig University on December 2, 1409?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q154804 p:P1075 ?s . ?s ps:P1075 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1409')) }