Question: Princess Stephanie of Windisch-Graetz, was the daughter of Prince Otto Weriand of Windisch-Graetz, and was the only child of Rudolf, Crown Prince of Austria and Princess Stéphanie of Belgium?
Sentence (from "Muqrin bin Abdulaziz"): On 23 January 2015, upon King Abdullah's death and the accession of King Salman, Muqrin became Crown Prince and First Deputy Prime Minister.
Relevant evidence: No