Complex sentence: The center of this civilization is displaced to the north and its extension and influence is clearly greater than that of its antecessor.their mining and metallurgy were quite advance, with bronze, silver and gold being mined and worked.they made weapons and jewelry.
Split into simpler sentences: The center of this civilization is displaced to the north and its extension and influence is clearly greater than that of its ancestor. Their mining and metallurgy were quite advanced, with bronze, silver and gold being mined and worked for weapons and jewelry.