Question: What nationality is Joseph Zu Salm-Reifferscheidt-Dyck's wife?
Sentence (from "Joseph zu Salm-Reifferscheidt-Dyck"): Altgraf zu Salm-Reifferscheidt-Dyck (4 September 1773 at Castle Dyck near Neuss – 21 March 1861 in Nice) was a German amateur botanist and owner of Castle Dyck.
Relevant evidence: No