Complex sentence: Like many southern plantations, Sedgely Abbey fell into ruin after the Civil War and the house and outbuildings were demolished in the 1870s and the coquina burned and spread on the fields as fertilizer.
Split into simpler sentences: Like many southern plantations, Sedgely Abbey was abandoned and fell into ruin after the Civil War. The vacant house was demolished in the 1870s and the coquina was burned and spread on the fields as fertilizer.