Question: Who was the spouse of Ilona Staller at the beginning of 1991?
Paraphrase: At the start of 1991, who was Ilona Staller married to?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q49941 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1991')) }