Complex sentence: Matsura Sayohime (松浦佐用姫) was a legendary heroine in Japanese Buddhist mythology of how she was born to Lord Kyōgoku after he and his wife prayed to the Bodhisattva Kannon.
Split into simpler sentences: Matsura Sayohime (松浦佐用姫) was a legendary heroine in Japanese Buddhist mythology. As recounted, she was born to Lord Kyōgoku after he and his wife prayed to the Bodhisattva Kannon.