Complex sentence: She was born Anna Lee Mills in Montrose, Colorado in 1921.she is the daughter of a famous race horse trainer.she began racing ponies at the age of 3.by the age of 12 she was racing flat, relay races.
Split into simpler sentences: She was born Anna Lee Mills in Montrose, Colorado in 1921.she is the daughter of a famous race horse trainer. She began racing ponies at the age of 3.by the age of 12 she was racing flat, relay races.