[["The trigger that started world war one was the assassination of Archduke Ferdinand of Austria Hungary by a Serbian assassin.", 27.0], ["Archduke Francis Ferdinand was assassinated", 10.0], ["It is generally thought to have begun when Archduke Franz Ferdinand of Austria was assassinated by the South Slav nationalist Gavrilo Princip on June 28, 1914.", 1.0]]
how did the world war one started
history,wars