Archduke is a title given to a member of the royal family who is not the reigning monarch. In this case, Archduke Ferdinand was the heir to the throne, so he was referred to as the Archduke.
Franz was Archduke Ferdinand's first name. He was born on December 18, 1863, in Graz, Austria.
Ferdinand was Archduke Ferdinand's middle name. It is a common name among members of the House of Habsburg-Lorraine.
Of Austria refers to Archduke Ferdinand's country of origin. He was an Austrian citizen.
Assassination refers to the murder of Archduke Ferdinand on June 28, 1914, in Sarajevo, Bosnia-Herzegovina. His assassination is considered to be the event that triggered the outbreak of World War I.