Question: What country was Józef Piłsudski a citizen of at the start of 1918?
Paraphrase: In the beginning of 1918 what country was Józef Piłsudski a citizen of?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q885 p:P27 ?s . ?s ps:P27 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1918')) }