Task: Question Generation
Input (English): The event of the Protestant Reformation and the politics that ensued has been cited as the origins of German identity that arose in response to the spread of a common German language and literature. Early German national culture was developed through literary and religious figures including Martin Luther, Johann Wolfgang von Goethe and Friedrich Schiller. The concept of a German nation was developed by German philosopher Johann Gottfried Herder. The popularity of German identity arose in the aftermath of the French Revolution.
Output (English): When did the popularity of the German nation increase?