The first Pentecostal converts were mainly derived from the Holiness movement and adhered to a Wesleyan understanding of sanctification as a definite, instantaneous experience and second work of grace. Problems with this view arose when large numbers of converts entered the movement from non-Wesleyan backgrounds, especially from Baptist churches. In 1910, William Durham of Chicago first articulated the Finished Work, a doctrine which located sanctification at the moment of salvation and held that after conversion the Christian would progressively grow in grace in a lifelong process. This teaching polarized the Pentecostal movement into two factions. The Wesleyan doctrine was strongest in the Southern denominations, such as the Church of God (Cleveland), Church of God in Christ, and the Pentecostal Holiness Church. The Finished Work, however, would ultimately gain ascendancy among Pentecostals. After 1911, most new Pentecostal denominations would adhere to Finished Work sanctification.