Complex sentence: The Prince summons every shoemaker in the kingdom in order to find out who the slipper was made for but none of them claim to have crafted the shoe, or sold it to anybody, and he concludes that the princess must be from a foreign land.
Split into simpler sentences: The Prince summons every shoemaker in the kingdom in order to find out who the slipper was made for. However, none of them claim to have crafted the shoe, or sold it to anybody, and he concludes that the princess must be from a foreign land.