Complex sentence: It was built on the lot of the uncompleted and controversial "Boracay Mansion" previously onwned by former President Joseph Estrada purportedly for his mistress, former film actress Laarni Enriquez.
Split into simpler sentences: It was built on the lot of the uncompleted and controversial "Boracay Mansion". Previously owned by former Philippine president Joseph Estrada, the house was reportedly built for his mistress, former film actress Laarni Enriquez.