Complex sentence: Shōmu abdicated in 749 in favour of his daughter, Princess Takano-hime, then Empress Kōken, who would favour the Fujiwara and particularly Nakamaro giving him lots of revenue and power by bestowing on him titles.
Split into simpler sentences: Shōmu abdicated in 749 in favour of his daughter, Princess Takano-hime, then Empress Kōken. She would favour the Fujiwara and particularly Nakamaro giving him lots of revenue and power by bestowing on him titles.