Title: Age of Enlightenment.
Question: Whose death in 1727 prompted poems to be written in his honour for decades?

Title: Ashkenazi Jews.
Question: Another piece of evidence of German communities in the holy city in the second half of the 11th century is due to what items being sent from Germany to Jerusalem?

Title: Light-emitting diode.
Question: What is the most common example of a machine vision system?

Title: Treaty.
Question:
The United Nations Framework Convention on Climate Change was supplemented by what protocol?