Question: What is the sex of the biological sibling of Frederick William III of Prussia?
Paraphrase: What is the intercourse of the organic sibling of Frederick William III of Prussia?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q37134 wdt:P3373 ?answer . ?answer wdt:P21 wd:Q6581097}
Answer: Prince Wilhelm of Prussia, Friedrich Wilhelm, Count Brandenburg, Prince Henry of Prussia, Prince Louis Charles of Prussia, Gustav Adolf Wilhelm von Ingenheim, Count Alexander von der Mark