Question: Who gave the {is son of} of {sister or brother} of {Stephen Báthory} ?
Paraphrase: Who is the son of the brother or sister of Stephen Báthory?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q54030 wdt:P3373 ?X . ?X wdt:P22 ?answer}
Answer: Stephen VIII Báthory, Stephen VIII Báthory, Stephen VIII Báthory