Complex sentence: The Conley Family in America began in Huntsville, Alabama, with the marriage of Harriet and Green Conley in the early 1800s, is among the first African-American families in Alabama to organize themselves formally prior to the Civil War.
Split into simpler sentences: The Conley Family in America began in Huntsville, Alabama, with the marriage of Harriet and Green Conley in the early 1800s. The Family is among the first African-American families in Alabama to organize themselves formally prior to the Civil War.