Complex sentence: State Bank of Travancore (SBT), a subsidiary of the State Bank Group, is owned by State Bank of India and private share-holders and is the premier bank of Kerala State, India, where it has 580 branches.
Split into simpler sentences: State Bank of Travancore (SBT), is a subsidiary of the State Bank Group and also has private share-holders. It the premier bank of Kerala State, India, where it has 580 branches.