Complex sentence: The film is based on "The Green Ribbon" (1929) by Edgar Wallace, and was one of the Edgar Wallace Mysteries the British second-features, produced at Merton Park Studios in the 1960s.
Split into simpler sentences: The film is based on "The Green Ribbon" (1929) by Edgar Wallace. It was one of the series of Edgar Wallace Mysteries the British second-features, produced at Merton Park Studios in the 1960s.