Complex sentence: John and Phoebe Brashear were active in their church as well; he served as the choir director of Bingham Street Methodist Episcopal Church and organized the Cantata Society, composed of church choirs from Pittsburgh's South Side.
Split into simpler sentences: John and Phoebe Brashear were active in their church as well. He served as the choir director of Bingham Street Methodist Episcopal Church, and organized the Cantata Society, composed of church choirs from Pittsburgh's South Side.