Complex sentence: John D. Rockefeller himself was a devoted Northern Baptist with numerous church related philanthropy works throughout his life, that is why he gave a grant to the Northern Baptists that resulted in the establishment of Central.
Split into simpler sentences: John D. Rockefeller himself was a devoted Northern Baptist with numerous church related philanthropy works throughout his life. This is why he gave a grant to the Northern Baptists that resulted in the establishment of Central.