Conversation so far:
Are there any other interesting aspects about the Franz Joseph I of Autria article?
the assassination of Franz Joseph's  nephew and heir-presumptive, Archduke Franz Ferdinand, in Sarajevo resulted in Austria-Hungary's declaration of war against the Kingdom of Serbia
When did  occur the assassination of his nephew and heir-presumptive, Archduke Franz Ferdinand, in Sarajevo that  resulted in Austria-Hungary's declaration of war against the Kingdom of Serbia?
On June 28, 1914
How did the assassination of his nephew and heir-presumptive, Archduke Franz Ferdinand, in Sarajevo that resulted in Austria-Hungary's declaration of war against the Kingdom of Serbia that contributed to the out break of the war On June 28, 1914?
it activated a system of alliances which resulted in World War I.
Who assassinated Franz Joseph I of Autria's nephew Archduke Franz Ferdinand?
Gavrilo Princip, a Yugoslav nationalist of Serbian ethnicity
What was the reason for Archduke Franz Ferdinand  death?
Archduke Franz Ferdinand was assasssinated
Was there any other deaths besides the death of Archduke Franz Ferdinand?
the assassination of Archduke Franz Ferdinand's wife Sophie, Duchess of Hohenberg

Question: Was there any other contributing factors to the outbreak of the war?
Self-contained rewrite: Was there any other contributing factors to the outbreak of the war besides the assassination of Archduke Franz Ferdinand ahd his wife Sophie Duchess of Hohenberg?