Complex sentence: The camping retreat was established in 1972 after 40 acres of land was donated for the sole purpose of establishing a camp for the disabled and much of the buildings that were built were from donated labor and materials.
Split into simpler sentences: The camping retreat was established in 1972 after 40 acres of land was donated for the sole purpose of establishing a camp for the disabled. Much of the buildings that were built were from donated labor and materials.