Complex sentence: Narai nominated his daughter, Kromluang Yothathep, to succeed him, and he three councilors were to act as regents until the princess took on a partner of her choice from one of the two Siamese councilors, Mom Pi or Phetracha.
Split into simpler sentences: Narai nominated his daughter, Kromluang Yothathep, to succeed him. His three councilors were to act as regents until the princess took on a partner of her choice from one of the two Siamese councilors, Mom Pi or Phetracha.