Complex sentence: Hall-Johnson was born in Aylesbury and grew up in Cambridge; living in Cambridge, Cambridgeshire, Hall-Johnson began his career in the youth system at Cambridge before joining Norwich City at the age of 11.
Split into simpler sentences: Hall-Johnson was born in Aylesbury and grew up in Cambridge. Living in Cambridge, Cambridgeshire, Hall-Johnson began his career in the youth system at Cambridge before joining Norwich City at the age of 11.