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 "Archduchess Elisabeth Marie of Austria"): Archduchess Elisabeth Marie of Austria (Elisabeth Maria Henriette Stephanie Gisela; 2 September 1883 – 16 March 1963) was the only child of Rudolf, Crown Prince of Austria and Princess Stéphanie of Belgium, and a granddaughter of Emperor Franz Joseph I of Austria and King Leopold II of the Belgians.
Relevant evidence: Yes