Complex sentence: Anne of Gloucester (1383-October 16 1438) was the eldest daughter of Thomas of Woodstock, Duke of Gloucester the youngest son of Edward III and Eleanor de Bohun, a great-great-grandson of Edward I. She married twice.
Split into simpler sentences: Anne of Gloucester (1383-October 16 1438) was the eldest daughter of Thomas of Woodstock, Duke of Gloucester and Eleanor de Bohun. Her mother was a great-great-grandson of Edward I. Anne married twice.