Complex sentence: St. George was founded as a cotton mission in 1861 under the direction of Apostle Erastus Snow which was called Dixie by Brigham Young, who was then the president of The Church of Jesus Christ of Latter-day Saints.
Split into simpler sentences: St. George was founded as a cotton mission in 1861 under the direction of Apostle Erastus Snow. It was called Dixie by Brigham Young, who was president of The Church of Jesus Christ of Latter-day Saints.