<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
What is the largest desert in the world?<|im_end|>
<|im_start|>assistant
The Antarctic Polar Desert would be the largest.<|im_end|>
<|im_start|>user
How big is it in size?<|im_end|>
<|im_start|>assistant
It's area is estimated to be 13.8 Million square kilometers.  It is equivalent to a circle with a radius of 2100km. 

This ranks it among the largest land structures on earth. Comparable entities are:
* ~0.8 x of the total area of Russia
* ~1.4 x of the total area of Canada<|im_end|>
<|im_start|>user
what is the largest desert in africa<|im_end|>
<|im_start|>assistant
It's the Sahara Desert!!<|im_end|>