Complex sentence: George was born on 21 October 1449 in Dublin, at a time when his father was beginning to challenge Henry VI for the crown, and his godfather was James FitzGerald, 6th Earl of Desmond.
Split into simpler sentences: George was born on 21 October 1449 in Dublin at a time when his father was beginning to challenge Henry VI for the crown. His godfather was James FitzGerald, 6th Earl of Desmond.