Complex sentence: Princess Sophie was the daughter of Archduke Franz Ferdinand of Austria and his wife Sophie, Duchess of Hohenberg, who were assassinated on 28 June 1914 in Sarajevo, Bosnia and Herzegovina.
Split into simpler sentences: Princess Sophie was the daughter of Archduke Franz Ferdinand of Austria and his wife Sophie, Duchess of Hohenberg. Ferdinand and his wife were assassinated on 28 June 1914 in Sarajevo, Bosnia and Herzegovina.