<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
When Greenland is white and ice-covered, why is it called Greenland?
<|assistant|>
Greenland is called Greenland because it used to be a grassy, verdant island, before the glaciers and ice caps developed and the area became white and covered in ice. This process happened in the last 2 to 4 thousand years.