Complex sentence: For example the Norse gods were divided into two groups, the Aesir and the Vanir, not three; and the Indian caste system is five-fold (or four-fold if the untouchables are excluded).
Split into simpler sentences: For example the Norse gods were divided into two groups, the Aesir and the Vanir, not three. The Indian caste system is five-way (or four-way if the untouchables are excluded).