Complex sentence: He was born in the United States where his father, also named Gerald, ran a polo team and is part of a famous racing family; his brother is Ian Balding, also a retired trainer who trained Mill Reef to win the Epsom Derby.
Split into simpler sentences: He was born in the United States where his father, also named Gerald, ran a polo team and is part of a famous racing family. His brother, Ian Balding, also a retired trainer, trained Mill Reef to win the Epsom Derby.