Complex sentence: The Butler Act was a 1925 Tennessee law forbidding public school teachers from denying the Biblical account of man's origin, and forbidding teaching the evolution of man from lower orders of animals instead of the Biblical account.
Split into simpler sentences: The Butler Act was a 1925 Tennessee law forbidding public school teachers from denying the Biblical account of man's origin. The law also prevented the teaching of the evolution of man from lower orders of animals in place of the Biblical account.