Question: What nationality is Archduke Otto Of Austria (1865–1906)'s mother?
Sentence (from "Princess Maria Annunciata of Bourbon-Two Sicilies"): Princess "Maria Annunciata" Isabella Filomena Sabasia of Bourbon-Two Sicilies, full Italian name: "Maria Annunziata Isabella Filomena Sabasia, Principessa di Borbone delle
Relevant evidence: Yes