Complex sentence: It is the first film in the "Fifty Shades" film series, while its sequels, "Fifty Shades Darker" and "Fifty Shades Freed", are scheduled to be released on February 10,2017, and February 9,2018, respectively.
Split into simpler sentences: It is the first film in the "Fifty Shades" film series. Its sequels, "Fifty Shades Darker" and "Fifty Shades Freed", are scheduled to be released on February 10,2017, and February 9,2018, respectively.