Complex sentence: The Tungabhadra River is a sacred river in southern India that flows through the state of Karnataka to Andhra Pradesh, where it serves as the chief tributary of the Krishna River.
Split into simpler sentences: The Tungabhadra River is a sacred river in southern India that flows through the states of Karnataka and part of Andhra Pradesh to merge with the larger Krishna River in Andhra Pradesh. It is the chief tributary of the Krishna River.