What is {rector} of {Leipzig University} that is {start time} is {1409-12-2} ?
Who was elected rector of Leipzig University on December 2, 1409?
SELECT ?obj WHERE { wd:Q154804 p:P1075 ?s . ?s ps:P1075 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1409')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q154804> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1075> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1409-12-2>
} 

Who was chosen minister of Leipzig University on December 2, 1409?