Complex sentence: MGM had previously released two films based on the book, the 1925 silent film and the more famous 1959 film of same name after which the rights of the later film was sold to Ted Turner in the 1980s.
Split into simpler sentences: MGM had previously released two films based on the book, the 1925 silent film and the more famous 1959 film of same name. After which the rights of the later film was sold to Ted Turner in the 1980s.