Complex sentence: On 16 July 2017, Whittaker was announced as the thirteenth Doctor in the science fiction television series "Doctor Who"; she will be the first woman in the history of the franchise to play the title role.
Split into simpler sentences: On 16 July 2017, Whittaker was announced as the thirteenth Doctor. The Doctor is the title character in the science fiction television series "Doctor Who"; she will be the first woman in the history of the franchise to play the title role.