Complex sentence: Landover is a very rural kingdom, populated by humans, gnomes, kobolds, and various other fantasy creatures, who often form separate societies with rulers who, while answerable to the king, are allowed a certain degree of autonomy.
Split into simpler sentences: Landover is a rural kingdom, populated by humans, gnomes, kobolds, and various other fantasy creatures, who often form separate societies. Their rulers, while answerable to the king, are allowed a certain degree of autonomy.