Complex sentence: Boggs Academy was a Presbyterian school founded in 1906 in Keysville, Burke County, Georgia, under the aegis of the Board of Missions for Freedmen, Presbyterian Church in the U.S.A., was an outstanding college-preparatory academy for African Americans.
Split into simpler sentences: Boggs Academy was a Presbyterian school founded in 1906 in Keysville, Burke County, Georgia, under the aegis of the Board of Missions for Freedmen, Presbyterian Church. Boggs was an outstanding college-preparatory academy for African Americans.