Complex sentence: When India became independent in 1947, the Church of South India (CSI) was formed as a united church of Anglicans, Baptists, Basel Mission, Lutherans and Presbyterians.
Split into simpler sentences: When India became independent in 1947, some churches joined to establish the Church of South India. The Church of South India was created as a united church of Anglicans, Baptists, Basel Mission, Lutherans and Presbyterians.