Complex sentence: Their earliest religious beliefs could have been based on a mixture of Brahmanism, Bhagavata religion, sun worship and some folk practices, though it cannot be ascertained to a particular period of time or geographical region.
Split into simpler sentences: Their earliest religious beliefs could have been based on a mixture of Brahmanism, Bhagavata religion and sun worship. Though it cannot be ascertained to a particular period of time or geographical region.