Complex sentence: The Holiness movement refers to a set of beliefs and practices which emerged from 19th-century Methodism, and to a number of Evangelical Christian denominations, parachurch organizations, and movements which emphasize those beliefs as central doctrine.
Split into simpler sentences: The Holiness movement involves a set of beliefs and practices which emerged from 19th-century Methodism. A number of Evangelical Christian denominations, parachurch organizations, and movements emphasize those beliefs as central doctrine.